Go to the link below and try the "FixDrive.zip" which may correct the problem.
You should update your virus/malware definitions and run full scans.
Not too long ago I brought down my thumbdrive to a print shop to have some stuff printed out. The guy there plugged my thumbdrive in and then later on told me that my thumbdrive had a virus. He said that if he right clicked and selected explore, and a window doesn't open up or it asks what program to open with, then the folder has a virus.
I just found out that if I right click, explore, my hard drive, it asks me to select what program to open it with...so what do I do?