If you’ve installed some themes that you later found to be not of your liking, you can easily remove them from your PC. Here’s how . . .
1. Right-click your desktop and select Personalize.
2. Click Theme.
3. The Theme Settings dialog box will appear.
4. Select the theme you want to get rid of and then click Delete. Vista will remove the definition file as well as the sound, cursors, etc. associated with that theme.