I don't have a clue why this happens, but from time to time my OS just goes nuts and forgets what it has, or what it's supposed to do... Mind you, I'm an experianced user, and have looked into fixing this more than once and haven't a clue why it does this... Example: I boot up to find that there is a duplicate of "everything" All my files are now doubled, so now I have two of everything on my computer now where before was one... :suspiciou Example2: I start my computer to find 1/2 of my startup programs are now missing their shortcuts... (Start menu) I have 4 of the best Spyware programs that I run every other day(sometimes everyday), A top notch Firewall, that I "never take down", and one of the best Antivirus program on the market today, (once a week fullscan),HD scan for bad sectors, Registry Mechanic 4 for bad values, which I run every other day, I back up my registry every otherday,once a week total cleanup of junkfiles, and total "smart placement" Defragmentation .....I think you get the idea, that regular Maintenace on my computer is done all the time to prevent such occurrences from happening to begin with...And no, my computer hasn't slowed down at all or anything like that... Summary is..I've ran full virus scan...nothing. I've run full spyware scans... nothing. I've totally clean my registery and deleted all bad values. I've check the HD for bad sectors...nothing. I've "closely" look at the software programs for conflicts...nothing... Anybody got any Ideas what would cause the change, and loss of data?