One of my friends encountered graphical issues with maximize/close buttons while using Google Chrome on his machine but I could not direct him how to solve the problem. Does anyone know why is this happening? Is it one of the Windows 7 updates?
Update:
The result of sfc /scannow:
Windows Resource Protection did not find any integrity violations.
Restarting Chrome does solve the problem but only for some time.
It does seem like clearing the thumbnails cache in Windows helped.

Firfoxwas making me the problem. And may be for all windows that appearing in explorer. – avirk Aug 20 '11 at 2:07