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PC Support: Most Popular Articles

These articles are the most popular over the last month.
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.
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.
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.
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 July 2015.
Belarc Advisor: A Complete Review
Belarc Advisor v8.5 is one of the better free system information utilities. Here's my complete review of the latest version of Belarc Advisor for Windows.
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.
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...
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.
21 Command Prompt Tricks & Hacks
Nearly two dozen Command Prompt tricks and other Command Prompt hacks to help you get the most out of the Command Prompt in Windows 7, 8, Vista, or XP.
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.
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.
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.
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 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.
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 August 2015.
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.
10 Free Programs That Will Help Update Drivers...
Free driver updater programs help you find and update the drivers on your computer. Here are the 10 best driver update tools, as of August 2015.
Access the Advanced Startup Options in Windows...
Here are several ways to access Advanced Startup Options, the recovery and repair menu in Windows 8 & 8.1 including System Restore, Safe Mode, and more.
How to Download Windows 7 the Legal Way
Most download Windows 7 to reinstall it, after losing a Windows 7 DVD or never receiving one. But from where? Is it legal? Tim Fisher has answers!
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 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.
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.
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.
How To Open Command Prompt in Windows 8 and 8.1
A guide on accessing Command Prompt in Windows 8 & 8.1. You'll need to open a Command Prompt window to execute most commands in Windows 8.
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.
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.
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.
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.
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.
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.
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.
Getting a 403 Forbidden Error? Here's What to Do
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.
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.
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!
How to Access Disk Management in Windows 7
Disk Management in Windows 7 can be accessed from the Computer Management utility. Follow these steps to open Disk Management in Windows 7.
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.
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.
ISO Files: Everything You Need to Know
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.
Magical Jelly Bean Keyfinder: A Complete Review
Magical Jelly Bean Keyfinder v2.0.10.11 is one of the easiest, most effective and least expensive (it's free) key finder programs available.
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 August, 2015.
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.
Easily Format a Hard Drive in Windows 7
Detailed tutorial on how to format a hard drive in Windows 7. You must format a hard drive to use it in Windows 7.
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.
How to Tell if Your Version of Windows 8 is...
Not sure if you have a 64-bit or 32-bit version of Windows 8? You need to know so you install the right drivers and software. Here's how to find out.
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.
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.
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.
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 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 Set Up Automatic Login on Windows 8
An easy tutorial on making Windows 8 or 8.1 login automatically. Configuring Windows 8 to auto logon is easy but should only be done in secure environments.
Trying to Rebuild Windows Boot Configuration...
A complete tutorial on rebuilding the Boot Configuration Data (BCD) store in Windows 8, 7, or Vista. The bootrec command is used to rebuild the BCD.
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.
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.
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.
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.
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.
37 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.
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.
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.
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.
Getting a 400 Bad Request Error? Here's What to...
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.
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.
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.
3 Easy Ways to Clear CMOS (Reset BIOS)
Three ways to clear the CMOS memory on your motherboard. Clearing CMOS will reset your BIOS settings to their factory default levels.
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.
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. Command Prompt is similar in appearance to MS-DOS.
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...
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.
Can Disk Management Help Format a Flash Drive...
Disk Management in Windows 8 can be accessed via Computer Management. Follow these simple steps to open Disk Management in Windows 8 or 8.1.
How Fast is Your Internet Connection?
A list of free Internet speed test sites, updated August 2015. An Internet speed test, or broadband speed test, tests your available bandwidth.
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.
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.
Here's Where (and How) to Download Windows 10
Want to update to Windows 10 for free? Need to download a Windows 10 ISO for USB or DVD install? Here's how to do it all!
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...
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.
34 Free Backup Software Tools: Ranked and...
Reviews of the best free backup software programs, updated August 2015. Use free backup software to automatically back up your files for safe keeping.
Need to Open the Control Panel in Windows 8...
A tutorial on opening Control Panel in Windows 8 & 8.1. Control Panel contains links to most of the tools used to configure various aspects of Windows 8.
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 8, Outlook.com, SkyDrive, Skype, and more.
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.
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 August, 2015.
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.
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...
Lost Your Microsoft Windows Product Key? Here's...
Instructions on finding lost Windows product keys, including the product keys for Windows 8, Windows 7, Windows Vista, Windows XP, and more.
How to Fix a Blue Screen of Death
Easy to follow tutorial to help fix a Blue Screen of Death. A BSOD might be caused by hardware or software so proper troubleshooting is important.
What's an EPUB File and How Do You Open One?
An EPUB file is an Open Publication Structure eBook file. Learn how to open an .EPUB file or convert an EPUB file to another file format.
Don't Have the Latest Windows Service Pack?...
Where to download Microsoft Windows updates and service packs, updated August 2015. Download Windows 8.1 Update, Windows 7 SP1, Windows Vista SP2, & more.
How to Easily Reset a Password in Windows 7
A step-by-step, screenshot based walkthrough of one of the most successful Windows 7 password reset procedures. No third-party software required!
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 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.
Change Your Windows 7 Product Key Code in Under...
Easy instructions on how to change your Windows 7 product key. Change your Windows 7 key using a feature available within the Control Panel.
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.
How to Manually Update Drivers in Windows 8, 7,...
Links to detailed instructions on how to update drivers in Windows, specific to your particular version of Windows.
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.
What is My Default Gateway IP Address?
The default gateway IP address is usually the IP address for your router. Learn how to find the default gateway in Windows 8, 7, Vista, or XP.
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.
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.
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.
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.
How To Force Windows To Restart in Safe Mode
Here's how to force Windows to start in Safe Mode on the next reboot, assuming you can't do so in other ways like from Startup Settings or the F8 menu.
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.
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.
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.
Need to Open an Elevated Command Prompt? Here's...
An elevated Command Prompt means running Command Prompt as an administrator, something you have to do to run certain commands in Windows. Here's how.
Winkeyfinder: A Complete Review
Winkeyfinder is a run-of-the-mill free key finder program but it does have a few extra features that you might find useful. Here's my complete review.
Need to Boot From a Disc Instead of Your Hard...
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.
Did a Recent Change Break Windows 8? A System...
A complete tutorial on using System Restore in Windows 8. A System Restore can fix problems by undoing registry, driver, and other changes in Windows 8.
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.
A Detailed & Step by Step Guide to...
A step by step tutorial to install Windows 8 or 8.1 from a USB flash drive, complete with screenshots and details on each necessary step.
How to Open an Elevated Command Prompt in...
A tutorial on opening an elevated Command Prompt in Windows 8 or 8.1. Some commands in Windows 8 require an elevated Command Prompt to be executed.
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.
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.
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.
How to Find Out Which Windows 7 Service Pack...
Detailed instructions on how to find out what Windows 7 service pack you have installed on your computer.
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.
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.
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.
Everything You Need to Know About the Control...
The Control Panel in Windows is an organized collection of Control Panel applets, each used to manage a specific aspect of Windows.
How to Update to Windows 8.1
A screenshot-based tutorial on upgrading to Windows 8.1 from Windows 8. Updating to Windows 8.1 is free for all users of Windows 8. Here's how to do it...
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 To Partition a Hard Drive in Windows 7
A tutorial on how to partition a hard drive in Windows 7. You have to partition a hard drive before you can format, and eventually use, it in Windows 7.
Lost Your Microsoft Office Product Key? Here's...
Instructions on how to find your lost Microsoft Office product key. A product key is required to install Microsoft Office 2013, 2010, 2007, etc.
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.
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.
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.
Easily Format a Hard Drive in Windows 8
Detailed tutorial on how to format a hard drive in Windows 8. You have to format a hard drive before you can save files to it in Windows 8.
LicenseCrawler: A Complete Review
LicenseCrawler appears unimpressive on first look but this little program finds more product keys than any other key finder I've tried.
Have a BSOD With a 0x0000007B Code? Here's How...
How to fix the STOP 0x0000007B code (INACCESSIBLE_BOOT_DEVICE) on a Blue Screen of Death. These are usually driver, virus, or hardware issues.
What are the Advanced Startup Menu Options and...
The Advanced Startup Options menu contains diagnostic & repair tools for Windows 8 like Command Prompt, System Restore, Startup Repair, and more.
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.
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.
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.
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.
Did You Know You Can Request a New Product Key...
Need a new Windows product key? If you've lost or can't read your product key, you may be able to get a new one from Microsoft for only $10.
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.
Key Combinations to Access Your Motherboard's...
List of BIOS access keys for motherboards from ASUS, MSI, abit, GIGABYTE, Intel, BIOSTAR, EVGA, and more.
How To Make Sure Your Drivers in Windows 7 Are...
You'll need to update drivers in Windows 7 to fix hardware problems or enable new features. Follow these easy steps to update drivers in Windows 7.
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 another file format.
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.
How to Start Your Version of Windows in Safe Mode
Tutorials on starting Windows in Safe Mode. These are specific walkthroughs for accessing Safe Mode in Windows 7, Windows Vista, and Windows XP.
How To Update Drivers in Windows 8 or 8.1
A complete tutorial on how to update drivers in Windows 8 or 8.1. You might update Windows 8 drivers to fix a hardware problem, enable a new feature, etc.
Where to Find Popular Drivers for Window 8 and...
Download the latest Windows 8 & 8.1 drivers for your hardware, updated June 29, 2015. Download Windows 8 sound, video, printer, and other drivers.
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.
How Do I Clear My Web Browser's Cache?
Tutorials on how to clear the browser cache in Firefox, IE, Chrome, and Safari. To clear the cache means to remove copies of web pages stored by the browser.
35 Online Backup Services: Ranked & Reviewed
Reviews of the best online backup services, updated August 2015. Online backup services back up your files to secure data centers over the Internet.
How to Repair the Most Serious Windows XP...
A tutorial on how to repair Windows XP by completing a Repair Install. Repairing Windows XP this way will fix damaged files but will keep other data.
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. Last updated August, 2015.
List of Executable File Extensions
A list of executable file extensions. Files with any of these file extensions might be able to execute a task automatically.

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