Windows Explorer seems to be missing. I found the a Short Cut in C:\Documents and Settings\Owner\Start Menu\Programs\Accessories and when I click on the Short Cut, it brings up My Documents. It is not visible in the Program Files, and I have configured the Folder Options to show All Hidden Files. Recently, I shut down the computer for the night and the next morning after booting up, three quarters of the All Programs menu was gone. I have not been successful opening any of the programs from the Programs Files. I have AVG Suite 7.5 for security and also run Threatfire. I havent figured out how to shut down the virus or syware conponents in AVG but do run Avast Home Edition 4.7 as well as Spyware Doctor weekly.