I'm running the WMP version 10 and while trying to play from my library today, I literally saw files being wiped away while I was watching.  I had approximately 550 files saved and there are now only 63.  Many of the files that are left are ones that I never had before.  I tried a system restore which worked for about 30 seconds and then the files started disapearing again.  Can anyone tell me what's going on?