If you're about to update a driver in Windows 7, check the version number of the driver you already have installed against the version number of the driver you're about to install. It may be that you already have the latest driver for the hardware installed.
Regardless of the reason, finding a driver's version number in Windows 7 is really simple.
Follow these steps to find a driver's version number from within Device Manager in Windows 7:
Note: Not using Windows 7? See the tip at the bottom of the page for help.
Note: There are also a few other ways to access Device Manager in Windows 7 but opening it via Control Panel is probably easiest.
In Device Manager, locate the device that you want to find the driver version number of.
Note: Work through the hardware categories by clicking the > icon. You'll find the specific hardware device you're looking for under one of these major hardware categories.
After finding the hardware device you're looking for, right click on the device's name or icon and click on Properties.
In the Properties window for the device, click the Driver tab.
On the Driver tab, look for Driver Version among the other statistics about the driver. It will be located above the several buttons.
Next to Driver Version you'll see the version number of the currently installed driver for this device. This is what you're after.
Important: Be sure to take note of the Driver Provider as well. It's possible that the currently installed driver is a default driver from Microsoft, in which case comparing version numbers will be pointless. Go ahead and install the updated manufacturer's driver but only if the new driver was released after the Driver Date listed here.
Remember to choose correctly between 32-bit and 64-bit drivers when downloading updates for your hardware.
Not sure which one to choose? See How To Determine if You're Running Windows 7 32-bit or Windows 7 64-bit for help.
Not a Windows 7 user? See How Do I Find a Driver's Version Number in Windows? for specific instructions for your version of Windows.