If you are having problems with the Aero themes in Windows 8, it often helps to restart the themes service. Here’s how.
1. Step Let’s click on the Start button and search for “Apps”, enter services.msc into the search.
2. Step Enter services.msc into the search bar and make sure that Apps is selected. Click on the services.msc icon that appears:
3. Step The list of Windows 8 services appears. You can now scroll down, hit T on the keyboard to jump to Themes, select it and then click on the blue Restart service link:
4. Step Was easy, huh? This can fix a lot of problems that you might have with your Aero themes.
If you’re new to Windows 8, you can now enable Aero themes