I was using ccleaner which found 1.3Gbytes of files to delete (temporary internet files, recycle bin etc) so i deleted it all then the hard drive froze and reset itself . The screen froze, so turned the machine off and rebooted logon ok then froze again. Took the hard drive out and put it in the usb caddy to see if i can get the data off tonight using my laptop, i'm hoping it's just a bad sector and nothing serious. dunno..
Wish me luck, i last backed up about 3 weeks ago so it's just recent pics and the email pst file i need.