If you're having trouble seeing the videos on the Windows 7 website, there are a few things you can try to fix the problem.
If you try to play a video on the Windows 7 website and the video window shows as just a black square, then you should check Windows Update to see if an updated video driver is available for the video card (also called graphics card) in your PC. Here's how:
Open Windows Update by clicking the Start button . In the search box, type Update, and then, in the list of results, click Windows Update.
In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.
If there are any available updates, click the links to see more information about each update.
Windows Update tells you if an update is important, recommended, or optional. Each type of update might include drivers. For more information, see Understanding Windows automatic updating.
On the Select the updates you want to install page, look for updates for the specific make and model of the video card in your computer, select the check box for that driver, and then click OK.
On the Windows Update page, click Install updates
If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Windows Update will tell you if the updates were successfully installed. For more information, see Update a driver for hardware that isn't working properly.
If you try to play a video on the Windows 7 website and see an error message, then you might need to reset the default program that Windows uses to play Windows Media Video (WMV) files. You can do this by changing the default program to something other than Windows Media Player, and then changing it back to Windows Media Player. Here's how:
Open Default Programs by clicking the Start button , and then clicking Default Programs.
Click Associate a file type or protocol with a program.
In the list of file types, under the Description column, click Windows Media Audio/Video file, and then click Change program.
Under Recommended Programs, click a program other than Windows Media Player.
On the Associate a file type or protocol with a program page, click Windows Media Audio/Video file, and then click Change program again.
Click Windows Media Player, and then click OK.
If these procedures don't fix the problem, you might want to check if all your programs and hardware drivers are up to date. For more information, see Automatically get recommended drivers and updates for your hardware
and Update a driver for hardware that isn't working properly.