helo, i install windows 7 ultimate few months ago. have SP1 and all windows updates. few days ago i notice my icon on desktop change its look (look of excel files and some icons are in rectangle)
as you can see in screenshot. i didnt change anything myself. why did it change?
i scan it with avast free antivirus, Malwarebytes Anti-Malware and HijackThis and everything is fine.