I have a Sony Viao laptop running Windows 7 x64 that has started freezing randomly. The computer will completely lock up, cursor frozen, ctrl+alt+delete not working... I have to do a hard shutdown. When I reboot it seems fine for a while. The only pattern that I notice is the freezes seem to happen when the computer is idle. Any help would be much appreciated. Oh, and I just tried to back up my files and as soon as I left it alone after starting the backup it froze again I have Norton 365 running in the background and it seems happy.