Troubleshoot Aero Peek
If you are trying to troubleshoot why Windows 7 Aero Peek isn't working, it is best to start with some simple yet often overlooked possibilities. The first is to check and see what version of Windows 7 you are using. Aero Peek is available in Windows 7 Home Premium, Professional, Ultimate, and Enterprise editions. To find out what version you are using, click the Start button, right-click Computer and select Properties. The version will be listed under Windows Edition. If you are using Windows 7 Home Basic, for example, you will not be able to use Aero Peek.
Another consideration is the desktop theme you have applied. If you are not using an Aero theme, Aero Peek will not work. To find out, right-click any blank area of your desktop and select Personalize. If one of the Basic and High Contrast themes is selected, click on an option under Aero Themes instead. This should resolve the problem instantly.
Finally, you can let Windows 7 find and resolve the problem for you. Click the Start button and type aero into the Instant Search box. Select Find and Fix Problems with Transparency and Other Visual Effects to open the Aero Troubleshooter. Click Advanced so that Windows will automatically fix any problems it finds, and then click Next to start the wizard. Wait while the wizard checks for and repairs any problems it detects.
If Windows is able to detect and fix any problems detected, the window borders will be translucent. If not, or if you want to see the details of the scan, click View Detailed Information. The report provided will show you what was fixed and give you details on other problems that could not be fixed, so that you can take steps to repair them.