your running a raid 0 setup, thats probably half your issue, very very prone to errors, especially with hard drives that aren't designed to be run in raid. Also, upgrading vista - win7 i have never had any success with, always errors and issues/freezes, just do a clean install of win 7. that should fix all your issues. also, you should be running 64bit win7 to take advantage of your 6gb ram.
Cheers for the reply.
Ive had the raid0 setup with both my vista and 7, which both were\are 64bit and never had any corupt files, reinstalls, or disc fails. I also do a clean format of my OS every 8 - 10 months same probley every time. This is the only ever issue ive had with 7, never did it with vista. All other software, application and games are running smooth with lightning reading and writting speeds.