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#1
Make sure the hidden .themes are in: My Themes is your current theme. These .theme files are located in the hidden C:\Users\User-Name\AppData\Local\Microsoft\Windows\Themes folder. Go to folder options to view and check Show hidden files, folders and drives.
If you right click on desktop and then personalize do MY Themes and Aero Themes show up?
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Post a screenshot of C:\Users\YOUR USER NAME\AppData\Roaming\Microsoft\Windows\Themes
Use these tutorials for posting screenshots.
Screenshot with Paint
How to Use the Snipping Tool in Vista - Vista Forums
Screenshots and Files - Upload and Post in Seven Forums
Jerry