I have an acer 5100, last month i upgraded to windows 7 32 bits, then upgraded to 4 gigs of ram,everything ran fine, except my dvd, I got the dvd working, I upgraded my window 7 to 64 bit, I was told to do this by the guy who installed my ram. Now windows says I have 10 GB free out of 52.1 GB, and I lost all my folders on the computer. Is there a way to get more memory. and retreive my lost files? I can't even download my virus protector.