What the hell?????

Sometime between bedtime (approx. 10:30 PM Saturday) and waking up this morning (approx. 8 AM) some critter, varmint or whatever, made a mess of my computer by deleting everything inside my Libraries folder on this Windows 7 computer which has a large hard drive and lots of memory. What is even weirder is that the information has just been moved around. It would be as if someone took all the city streets you are familiar with and moved them to other locations in your city. Also, my Robo Form program is now blank as the 200+ passwords have disappeared and when I try to start entering them into the program new, I receive the error message that i needs a browser in which to save or fill forms. Well, what is the matter with this one, the one I am using right now????

At least I apparently have not lost anything especially my photos from many vacations going back a number of years but how and why did this happen?

Update as of 11-July-2011

Just as mysteriously as did those files and folders disappear from the Libraries folder then they reappeared a few days ago. This is great but I still do not know what happened to make those links disappear nor just just suddenly reappear. Strange...very strange indeed...