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PC Support: Most Popular Articles

These articles are the most popular over the last month.
What to Do When Windows Update Gets Stuck
Help on what to do when your computer gets stuck or freezes (locked-up) during the installation or configuration of a Windows update.
13 Ways You're Screwing Up Your Computer
I'm sure you're doing everything right but you might want to pass this along to your friends who are probably making all of these mistakes!
21 Command Prompt Tricks & Hacks
21 Command Prompt tricks and other Command Prompt hacks to help you get the most out of the Command Prompt in Windows 10, 8, 7, Vista, or XP.
Free and Public DNS Servers
A list of public and completely free DNS servers, plus instructions on how to change them. This DNS server list was last updated in February 2016.
Here's What to Do When Your Computer Doesn't...
Here's what to do when your computer won't turn on. Fix a desktop, laptop, or tablet that won't boot all the way, or even one that won't start at all.
Getting a 500 Internal Server Error? Here's...
The 500 Internal Server Error (aka HTTP 500 error) is a generic error suggesting a problem with the website's server. Here's what you can do about it.
7 Free Windows Password Recovery Tools
Windows password recovery tools are used to recover Windows log on passwords. Here are the 7 best free Windows password recovery and cracking tools.
How to Download and Install DirectX
Where and how to download and update DirectX. Updating DirectX 12, 11, 10, or 9 is easy and could improve game performance in Windows.
11 Free Programs That Will Help Update Drivers...
Free driver updater programs help you find and update the drivers on your computer. Here are the 11 best driver update tools, as of February 2016.
Here's What to Do When Your Computer Starts but...
Does your computer turn on but show just a black screen? If some things seem to be working properly, but there's no display, give this a try...
19 Free Data Recovery Software Tools
Free data recovery software, aka free file recovery or undelete software, can help recover deleted files. Here are reviews of the best ones out there.
Need an ISO Image on a USB Drive? Here's How to...
Getting an ISO file onto a USB drive isn't as easy as copying the file. Here's a complete tutorial on how to burn an ISO to USB, like a flash drive.
How to Delete Everything on a Hard Drive
Easy instructions on how to wipe a hard drive. A hard drive wipe will erase everything on the hard drive - something deleting and formatting can not do.
How To Open the Windows Registry Editor
Easy instructions on how to open Registry Editor, the program included in Windows 10, 8, 7, Vista, and XP that's used to make changes to the registry.
Getting a 502 Bad Gateway Error? Here's What to...
The 502 Bad Gateway error means that two different servers involved in loading a web page (or other task) are not able to communicate. Here's what to do...
How To Open Disk Management
Disk Management is used to format and make other drive changes in Windows. Here's how to open Disk Management in Windows 10, 8, 7, Vista, and XP.
16 Free Programs for Remotely Accessing Your PC
A list of the best free remote access programs, sometimes called free remote desktop or remote control software. Last updated February, 2016.
22 Free Product Key Finder Programs
22 totally free key finder software programs, ranked and reviewed. Keyfinders find lost software product keys or serial numbers. Updated Feb. 2016.
How to Download Windows 7... the Legal Way
Most download Windows 7 to reinstall it, after losing a Win 7 DVD (or never receiving one). But from where? Is a Windows 7 download even possible? YES!
How to Boot From a USB Flash Drive
Instructions on how to make your computer boot from a USB device, like a flash drive or a USB connected hard drive.
What You Should Do if You Forget Your Windows 7...
Try not to panic if you forgot your Windows 7 password. Luckily, there are a number of things you can do to overcome a forgotten password.
403 Forbidden Errors: What They Are & How...
The 403 Forbidden error means that whatever resource or webpage you were trying to access is forbidden from being accessed. Here are some things to try.
Think You Might Have a Hard Drive Problem? Test...
A list of free hard drive testing software programs. These hard drive test programs will do just that - test your hard drive for problems.
How To Find Your Windows 7 Product Key
Lost your Windows 7 product key? Here's how to find your Windows 7 product key using a free key finder program which will extract the key from the registry.
How Do I Update to the Latest Version of...
It's really simple to update Internet Explorer, which involves either downloading and installing the latest version, or using Windows Update. Here's how.
Need to Start Windows 7 in Safe Mode? Here's How
A complete tutorial on how to start Windows 7 in Safe Mode. Starting Windows 7 in Safe Mode can help diagnose and solve many serious problems.
The World's Most Complete List of Windows...
A complete list of the over 280 Command Prompt commands across Windows 8, 7, Vista, and XP, including full descriptions of each CMD command.
A Full Review of Driver Booster, a Free Driver...
Driver Booster is a free driver updater program that's easy to use, automatically checks for outdated drivers, and lots more. Here's my full review.
Forgot Your Windows Password? This Free Program...
Ophcrack is simply the best free Windows password recovery software program available. See my full review of Ophcrack LiveCD v3.6.0.
How to Reinstall Windows 7 From Scratch
A Windows 7 clean install tutorial with screenshots and full instructions. A clean install of Windows 7 is often the best way to reinstall Windows 7.
Are You Seeing a Code 43 Error? Here's What You...
How to fix the Code 43 error in Device Manager. Code 43 errors appear when a device reports general problems to Windows.
Getting a 404 Not Found Error? Here's What to Do
The 404 Not Found error, often called Error 404 or an HTTP 404 error, means that the webpage you were trying to load was not found. Here's what to do.
Use the SFC /Scannow Command to Repair Windows...
The sfc scannow option is the most useful way to run System File Checker. Using sfc with the scannow option will scan and repair important Windows files.
Getting a 503 Service Unavailable Error? Here's...
The 503 Service Unavailable error means that the web site's server is not available, usually due to maintenance or server overloading.
3 Easy Steps to Access BIOS
Enter BIOS with these steps. Access BIOS to make hardware configuration changes, set boot order, reset BIOS passwords, change BIOS settings, and more.
No DVD Drive? Install Windows 7 From a Flash...
Before you can install Windows 7 from a USB flash drive, you must properly format the drive and then copy the setup files to it. Here's how.
How To Update Drivers in Windows
Detailed tutorial on how to update drivers in Windows 10, Windows 8, Windows 7, and Windows Vista/XP. Driver updates can fix problems, enable features, etc.
Access the Advanced Startup Options in Windows...
Here are several ways to access Advanced Startup Options, the recovery and repair menu in Windows 10 & 8 including System Restore, Safe Mode, & more.
Did You Forget Your Windows 7 Password? Here's...
You can reset your Windows 7 password if you've forgotten it. Learn how to reset the password to your Windows 7 account, for free, without extra software.
How To Open Command Prompt in All Versions of...
Here's how to open Command Prompt in Windows 10, 8, 7, Vista, and XP. You have to open the Command Prompt in Windows before you can execute a command.
Windows 7: What You Need to Know
Basic information about Microsoft Windows 7 including editions, service packs, release date, minimum and maximum hardware, and more.
How To Format a Hard Drive in Windows
A detailed tutorial on how to format a hard drive in Windows 10, Windows 8, Windows 7, Windows Vista, & Windows XP. Windows requires drives to be formatted.
Windows 10: What You Need to Know
Important information about Microsoft Windows 10 including release date, editions, hardware requirements, the free upgrade, and lots more.
How To Open Control Panel in All Versions of...
Here's how to open Control Panel in Windows 10, 8, 7, Vista, and XP. You'll need to access Control Panel to change many of your computer's settings.
Getting a 504 Gateway Timeout Error? Here's...
A 504 Gateway Timeout error, also called an HTTP 504 error, means that one server didn't receive a response from another quickly enough so it timed out.
A Complete Tutorial on Changing the Boot Order...
Detailed tutorial on how to change the boot order in BIOS. A change to the boot sequence will change the order in which devices are booted from.
What's a DAT File and How Do You Open One?
A DAT file might be a video, email, or generic data file. Learn how to open a .DAT file or convert a DAT file to another file format.
400 Bad Request Errors: What They Are & How...
The 400 Bad Request error means that the request you sent to the website server to view the page was incorrect somehow. Here are some things to try.
Here's What to Do When Your Computer Has No Power
There are lots of reasons why a computer might not be getting any power. If you turn on your computer and it doesn't power on at all, give this a try...
What's a TGZ File and How Do You Open One?
A TGZ file is a GZIP Compressed Tar Archive file. Learn how to open a .TGZ file or convert a TGZ file to another file format.
Forget Your Windows 8 Password? Here's How to...
A complete tutorial on how to reset a Windows 8 password, for free, without using password recovery software or other third-party software.
Recuva File Recovery: A Full Review
Recuva is the very best free file recovery program available. I highly recommend you try Recuva before any other undelete program.
Belarc Advisor: A Complete Review
Belarc Advisor is one of the better free system information utilities. Here's my complete review of the latest version of Belarc Advisor for Windows.
What's an ISO File?
An ISO file is a single file containing all the data from a CD, DVD, or BD. The ISO file (or ISO image) is a perfect representation of the whole disc.
Trying to Rebuild Windows Boot Configuration...
A complete tutorial on rebuilding the Boot Configuration Data (BCD) store in Windows 10, 8, 7, or Vista. The bootrec command is used to rebuild the BCD.
Don't Have the Latest Windows Service Pack?...
How to get the latest updates and downloads to Windows 10, Windows 8, Windows 7, Windows Vista, and Windows XP. Last updated February 2016.
Here's Where to Download Windows 8 or 8.1
Want to download Windows 8 or 8.1 instead of buying it on disc? Need to download Windows 8.1 or 8 to replace a DVD or ISO? What about for free? I have answers!
Can't Open a File? Here's How to Convert It
Looking for a free file format converter? Here's a list of 100% free file converter programs for video files, audio files, image files, and more.
Lost Your Windows 8 Product Key? Here's How to...
Lost your Windows 8 product key? You may be able, under certain conditions, to extract your Windows 8 or Windows 8.1 product key from the registry.
No DVD Drive? Install Windows 8 From a Flash...
Here's how to install Windows 8 or 8.1 from a USB device like a flash drive. You'll need to properly format the USB drive and then copy the Windows 8 files.
Have a BOOTMGR Error? Here's How to Fix It
How to fix the BOOTMGR is Missing and Couldn't Find BOOTMGR errors that sometimes appear during startup on a Windows 10, 8, 7, or Vista computer.
36 Completely Free Registry Cleaner Programs
A list of the best freeware registry cleaners available today. Free registry cleaners remove duplicate or unwanted entries from the Windows Registry.
How to Safely Download & Install Software
Software you download could have malware, adware, PUPs, and other issues. Here's how to safely download and install software on your computer.
Did You Know There Were This Many Commands in...
A complete list of Command Prompt commands in Windows 7. There are over 230 commands, referred to as CMD commands or DOS commands, in Windows 7.
Are You Seeing a Code 10 Error? Here's What You...
How to fix the This device cannot start. (Code 10) error in Device Manager. Code 10 errors are often due to driver issues.
34 Free Backup Software Tools: Ranked and...
Reviews of the best free backup software programs, updated Feb. 2016. Use free backup software to automatically back up your files for safe keeping.
Here's What to Do When Your Computer Freezes...
A really frustrating problem is when Windows hangs or gets stuck while starting. If Windows starts to load but freezes without an error, give this a try...
February's Patch Tuesday: 13 Security Updates...
Details on the updates included in the Patch Tuesday February 2016 release by Microsoft (February 9, 2016), plus what to do when they cause problems.
15 Free Bootable Antivirus Programs
A list of free bootable antivirus programs. A free bootable virus scanner is what you need to use to remove viruses from your PC when Windows won't start.
Think Windows Updates Broke Your PC? Here's...
A detailed tutorial on how to correct problems caused by Windows updates, including security updates pushed by Microsoft on Patch Tuesday.
Forget Your Windows 8 Password? Here Are Your...
No, you are not locked out of your computer forever if you forgot your Windows 8 password. Here are several things you can do to get back in.
5 Free Ways to Easily Format Your 'C' Drive
Here are 5 ways to format C drive. To format C means to format the drive that the operating system is on, which is usually the C drive.
How To Create an ISO Image File From a CD or DVD
One easy way of backing up a disc is creating an ISO image of it. See these easy instructions for creating an ISO image file from a CD, DVD, or BD disc.
How to Find the Administrator Password in...
A list of ways to find the Windows 7 administrator password. An admin password in Windows 7 is the one needed to access some advanced areas in Windows.
What is the Command Prompt in Windows?
Command Prompt is a command line interpreter program available in Windows 10, 8, 7, Vista, & XP. Command Prompt is similar in appearance to MS-DOS.
3 Easy Ways to Clear CMOS (Reset BIOS)
Here are 3 different ways to clear the CMOS memory on your motherboard. Clearing CMOS will reset your BIOS settings to their factory default levels.
How To Open an Elevated Command Prompt in...
An elevated Command Prompt means running CMD as an administrator, something some commands require. Here's how to do it in Windows 10, 8, 7, & Vista.
What is My Default Gateway IP Address?
The default gateway IP address is usually the IP address for your router. Here's how to find your default gateway in Windows 10, 8, 7, Vista, or XP.
What's an EPUB File and How Do You Open One?
An EPUB file is an Electronic Publication file. Learn how to open an .EPUB file or convert an EPUB file to another file format.
Here's What to Do When Your Computer Shuts Off...
A hardware issue or short is a likely cause of these types of issues. If you turn on your computer and it promptly turns itself off, give this a try...
Forgot Your Microsoft Account Password? Here's...
How to reset your Microsoft account password. This procedure may reset the password you use to login to Windows 10, Windows 8, Outlook.com, and more.
How to Fix a Blue Screen of Death
A BSOD might be caused by hardware or software so troubleshooting is important. Here's how to fix a Blue Screen of Death in Windows 10, 8, 7, Vista, or XP.
What's an ASPX File and How Do You Open One?
An ASPX file is an ASP.NET Source file. Learn how to open an ASPX file or convert an .ASPX file to another file format.
Are You Cleaning Your Flat Screen TV or Monitor...
How to safely clean your flat screen monitor or TV. LCD, LED, and other flat screens require special care when cleaning to prevent permanent damage.
15 Free Defrag Software Tools: Ranked &...
A list of the best defrag software programs. Free defrag software will defragment your hard drive, helping to speed up your PC. Updated Feb., 2016.
Operating Systems: Everything You Need to Know
An operating system (OS) is software that manages software and hardware in a computer. Some operating systems include Windows, Linux, and Mac OS.
How To Use System Restore in Windows
How to use System Restore in Windows 10, 8/8.1, 7, Vista, or XP. System Restore will 'undo' changes to important areas of the operating system.
42 Free Programs to Completely Wipe Data From...
Here are several free data destruction software programs, sometimes called disk wipe software or hard drive eraser software. Last updated Feb., 2016.
How to Set Up Automatic Login on Windows 7
Easy instructions on how to make Windows 7 login automatically! Configuring Windows 7 to auto login can substantially speed your PC's total boot time.
The COMPLETE List of DOS Commands
There are nearly 100 DOS commands available in MS-DOS. See a complete list of MS-DOS commands, commonly referred to as DOS commands.
Don't Have the Latest MS Office Service Pack?...
Where to download the latest Microsoft Office service packs, updated February 2016. Download Office 2013 SP1, Office 2010 SP2, Office 2007 SP3, etc.
How to Use the Ping Command in Windows
The ping command is used to verify that a device can communicate with another on a network. Learn more about ping and see several ping command examples.
7 Ways To Find Lost Windows Passwords
Lost your Windows password? Here are several ways to find your lost Windows 8, 7, Vista, or XP password.
Is Your RAM Bad? Test it With Any of These Free...
A list of the best free memory test (RAM test) software. Test your memory with a RAM test program to find even tiny problems with your computer memory.
Not Sure What Version of Windows is on Your PC?...
Do you know what version of Windows you have? It's important to know for lots of reasons. Here's how to tell what version of Windows is on your PC.
How To Recover Passwords Using Ophcrack
A complete tutorial with screenshots on using Ophcrack LiveCD v3.6.0 (Ophcrack 3.6.0) to crack a Windows password.
How to Fix DLL Errors... the Right Way
The only way to permanently fix DLL errors is by fixing the underlying cause of the issue, not by downloading DLL files. Here's how to do it.
What You Need to Know About Windows 8
Basic information about Microsoft Windows 8 including release date, available editions, the Windows 8.1 update, minimum hardware requirements, and more.
Have an Xinput1_3.dll Error? Here's How to Fix It
Xinput1_3.dll Not Found errors usually indicate a DirectX problem. Don't download xinput1_3.dll, fix the problem the right way.
A Full Review of DBAN, a Free Data Destruction...
Darik's Boot And Nuke (DBAN) is a free data wipe program for completely erasing a hard drive. Here's my complete review of DBAN.
A Look at the Best Internet Speed Test Sites
A list of free Internet speed test sites, updated February 2016. An Internet speed test, or broadband speed test, tests your available bandwidth.
Need to Remove Your Windows 7 Password? Here's...
If security isn't a concern, you can remove (delete) your Windows 7 password, allowing unrestricted access to your Windows 7 computer. Here's how.
How To Partition a Hard Drive in Windows
A detailed tutorial on how to partition a hard drive in Windows 10, Windows 8, Windows 7, Vista, and XP. You have to partition a drive prior to formatting.
What's an XML File and How Do You Open One?
An XML file is an Extensible Markup Language file. Learn how to open an .XML file or convert an XML file to, or from, other formats like JSON, etc.
Have an Ntdll.dll Error? Here's How to Fix It
A troubleshooting guide for ntdll.dll errors, including C0000221 unknown hard errors and crashes. Don't download ntdll.dll, fix the problem the right way.
33 Online Backup Services: Ranked & Reviewed
Reviews of the best online backup services, updated February 2016. Online backup services back up your files to secure data centers over the Internet.
Forgot Your Windows Password? Reset It With...
Offline NT Password & Registry Editor is a Windows password reset/remover tool that works nearly 100% of the time. See my complete review of ONTP&RE.
Don't Want to Fix Your Computer Yourself? Here...
Don't want to fix your computer yourself? Here are your options, including calling tech support, finding a local repair service, and a lot more.
Tools to Help Remove Passwords From PDFs
A list of the best free PDF password remover tools for Windows, plus free PDF password crackers and recovery programs for both user and owner passwords.
Have an ISO File But Need it On a DVD? Here's...
In most cases you'll need to burn an ISO file to a DVD before you can use it. Here are easy instructions for burning an ISO image to a DVD (or CD/BD) disc.
How Do I Clear My Web Browser's Cache?
Here's how to clear the browser cache in Chrome, Firefox, Edge, IE, Chrome, & Safari. To clear the cache means to remove stored copies of web pages.
What's an XLSX File and How Do You Open One?
An XLSX file is an Microsoft Excel Open XML Format Spreadsheet file. Learn how to open an .XLSX file or convert an XLSX file to another file format.
How To Open Disk Management From the Command...
Disk Management can be opened from Control Panel but it takes several clicks to get there. Try opening Disk Management via its command for a quicker start.
Here's How to Access the Advanced Boot Options...
The Advanced Boot Options menu is a menu of advanced Windows startup and troubleshooting modes, including Safe Mode.
Control Panel: Everything You Need to Know
The Control Panel in Windows is an organized collection of Control Panel applets, each used to manage a specific aspect of Windows. Here's more...
Computer Hardware: Everything You Need to Know
Computer hardware refers to the physical parts of a computer system. Some basic computer hardware includes the motherboard, CPU, RAM, hard drive, etc.
Never Forget Your Password Again With a Windows...
Having a Windows 7 password reset disk is valuable if you ever forget your password. Once created, you can use it to reset your Windows 7 password.
How to Use the Net Use Command in Windows
The net use command is used to manage shared resources. Learn more about the net use command and see several net use command examples.
BIOS Setup Utility Access Keys for Popular...
List of BIOS access keys for major computer systems from Gateway, Toshiba, Dell, Sony, eMachines, HP, Lenovo, Acer, and more.
How Do I Find My Internet Download Manager...
Lost your Internet Download Manager serial number? Here are two different, but completely legal ways to get IDM working again. No cracks required.
Here's What to Do When Your Computer Won't Go...
Here's what to do if your computer won't start in Safe Mode but instead boots to Startup Settings or Advanced Boot Options every time.
How to Automatically Repair Windows 7 Problems
A tutorial for completing a Windows 7 Startup Repair. Running a Startup Repair is a good first troubleshooting step if Windows 7 isn't starting properly.
How to Save a Command's Output to a File
Learn how to redirect a command's output to a file. In other words, how to save the results of running a command to a file so you can view the data later.
What is the Windows Registry?
The Windows Registry is where nearly all configuration settings are stored in Windows. The Windows Registry is accessed with the Registry Editor tool.
Access Control Panel Items Using These Commands
A complete list of Control Panel command line commands for each Control Panel applet available in Windows 8, Windows 7, Windows Vista, and Windows XP.
Need to Start Windows 8 or 8.1 in Safe Mode?...
A tutorial on starting Windows 8 or 8.1 in Safe Mode. If you can start Windows 8 in Safe Mode you may be able to fix whatever startup problem you're having.
How To Boot From a CD, DVD, or BD Disc
Detailed instructions on how to make your computer boot from a CD, DVD, or BD disc. You may need to boot from a disc to install Windows, run live CDs, etc.
What's a MOBI File and How Do You Open One?
A MOBI file is a Mobipocket eBook file. Learn how to open a .MOBI file or convert a MOBI file to another file format like EPUB or PDF.
How to Erase a Hard Drive Using DBAN
A full tutorial on using Darik's Book And Nuke (DBAN) to permanently erase all the files from a hard drive.
Is Your Computer Beeping? Here's What to Do
Hearing beep codes when you turn on your computer? Beep codes are clues as to why your computer isn't working. Here's what to do.
DLL Files: What You Need to Know
A Dynamic Link Library, or DLL, file is a kind of file that contains specific code that many programs can share. Here's more on DLL files...
How To Open Device Manager in Windows 10, 8, 7,...
Here's how to open Device Manager in Windows 10, 8, 7, Vista, or XP. You'll need to start Device Manager to manage hardware, fix driver issues, etc.
Disk Management: What It Is and How To Use It
Disk Management is the tool in Windows used to change drive letters, format drives, shrink partitions, and perform other disk tasks.
FLV Files: How to Play & Convert Them
An FLV file is a Flash Video file. Learn how to open an .FLV file or convert an FLV file to another file format like MP4, AVI, etc.
A Full Review of CCleaner, a Free Registry...
CCleaner is without a doubt the best free registry cleaner available. See my full review of CCleaner, a free program from Piriform.
Lost Your Adobe Acrobat Serial Number? Here's...
Lost your Adobe Acrobat DC serial number? Learn how to find your serial number legally, without cracks or keygens. Works for Acrobat DC, X, 9, etc.
Do You Know Every Single Windows 8 Command...
A complete list of Command Prompt commands in Windows 8. Around 230 CMD commands exist in Windows 8, often incorrectly referred to as DOS commands.
11 Ways to Keep Your Computer Cool
Here are several ways to keep your PC cool. If your computer gets too hot it can stop working and cause damage so keeping the temperature down is important.
Getting a Code 28 in Device Manager? Here's...
How to fix the Code 28 error in Device Manager. Code 28 errors are most often caused by missing drivers.
Are Windows Updates Installing Automatically?...
Windows Update settings control things like automatic update installations, when updates should be applied, and much more. Here's how to change them.
How to Change a Drive's Letter in Windows
Here's how to change drive letters in Windows 10, 8, 7, Vista, or XP. You can change the letter for any drive... except the one Windows is installed on.
How To Completely Erase a Hard Drive
Easy instructions to completely erase a hard drive. To truly erase hard drive data forever, you may have to do more than format the drive or delete files.
An Easy Guide to Clean Installing Windows 8 or...
A Windows 8 & 8.1 clean install tutorial with detailed instructions and screenshots. A clean install is the best way to install Windows 8 or Windows 8 Pro.
Need to Clean Install Windows? Here's How
A Windows clean install is useful for fixing serious Windows problems. A clean install will erase everything from your computer. Here's how to do it.
What's a PDF File and How Do You Open One?
A PDF file is a Portable Document Format file. Learn how to open a .PDF file or convert a PDF file to another file format.
Comcast Speed Test: A Complete Look
The Comcast Speed Test, also called the XFINITY Speed Test, is a Comcast-provided Internet speed test tool. Here's my complete look at the test.
How Do I Automatically Repair Windows Problems?
The Startup Repair, Repair Install, and Refresh Your PC processes automatically replace damaged or missing Windows files. Here's how to do it.
What's an M3U8 File and How Do You Open One?
An M3U8 file is a UTF-8 Encoded Audio Playlist file. Learn how to open an .M3U8 file or convert an M3U8 file to another file format.
Never Download DLL Files! Here's Why
DLL download sites sometimes provide easy fixes for DLL problems by allowing single DLL downloads but you should NEVER use them. Here's why...
What's a DOCX File and How Do You Open One?
A DOCX file is a Microsoft Word Open XML Format Document file. Learn how to open a .DOCX file or convert a DOCX file to another file format.

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