Hi I when I went over to my desktop after getting up this morning I found that it didn't react to me moving the mouse, and the screen stayed black even when I turned it on. I turned it off, then back on. It froze during the windows boot screen (black screen + logo ) It kept doing that. Tried System Restore, it froze during that too. On Windows 7 install it freezes during the Expanding phase at random points. What I've tried: Installing on another harddrive. (same result) Windows Restore Memory Diagnostic (no Errors) Chkdsk (not /r the short version, will have to make a boot cd to do that) I'm also running Memtest86 as I'm posting this. I would greatly appreciate any help in this matter, and hope with you're help I'll be able to fix this.