A very old Toshiba laptop with Core Duo and Windows 7 after successful booting just freezes. Sometimes it would not even boot but show weird screen distortions and shut off by itself but most often it boots well, then freezes. Sometimes after freezing shuts off. I tried to check the disk from safe mode with checkdisk and after that it freezes even when put in safe mode (even before the desktop). I tried to restore it with the usb boot (upgrading to 10 as I dont have a 7 copy) but it says can't perform, need windows to be booted (at least when I'm choosing to save files). Any help appreciated greatly!