I've looked fairly hard for answers to no avail. Concerning XP home edition: [1] If I attempt to open or even pass the mouse over an avi in explorer I get an explorer crash (windows has closed this program) and a message about Date Execution Prevention. Doesn't happen in XP pro on another machine and avis will play in WMP. [2] Somewhere there has to be a setting for this: Some programs revert files back to previous versions, ie, a text file that is a user.ini repeatedly goes back to an earlier version that doesn't actually exist anymore that I can see. Is there some kind of auto backuprestore bs or something? It's freaking me out quite frankly.