Examples: C:\W C:\Q C:\M\Q C:\W\W See attached screenshot.
Some, but not all of these folders are hidden. They have arbitrary date stamps, mostly from 2010. Many of the folders have bits of the C: drive copied inside.
This is difficult to describe, but I hope to hear from others if you've seen this. Actually, I hope you all don't have to run into this. It's a full wipe and reload to fix I fear. ESET NOD32 says some are "variant of Win32/Krytik.AY trojan" others Conficker.Y worm.
Edit: Moved topic from Win 7 to the more appropriate forum. ~ Animal