How to enable Taskbar Thumbnail Preview in Windows 7

Warning: Improperly modifying the Windows Registry can cause Windows to not operate correctly. Therefore if you do not feel comfortable editing the Windows Registry then you can download a registry file to perform these steps for you. Otherwise, please continue with these steps:

1. Close all open windows so you are at your desktop.
2. Click on the start button and enter Regedit in the search field.
3. When User Account Control asks if you would like to allow this program to make changes, click on the Yes button.
4. Navigate to the following Registry key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
5. On the right hand portion of the Registry Editor screen, scroll through the list of values till you see the ExtendedUIHoverTime value. Then right-click on the ExtendedUIHoverTime and select Delete to delete the value.
6. When done you can close the Registry Editor.
7. To put these changes into effect you can reboot, logoff and logon again, or kill the Explorer.exe process, which will automatically restart.
8. The Windows 7 Thumbnail Taskbar Preview should now be enabled again.