I got the blue screen of death and it restarted... It read 'Invalid partition table' Since then i have tried to press f5 and f8 to access the advanced boot but nothing comes up. I have also been into bios to try and see what harddrive is assigned to boot, its all okay there. I dont have a disk drive on this computer as its a custom build but i installed windows 7 originally using a usb pen and set the boot to boot from that and installed it. Even tried sticking the usb stick with the setup again and it wont seem to reboot from that either. Any help would be much apreciated as im getting so desperate here :/ Thanks in advance for any help!! P.S. (More info) I have windows 7 x64 i think and a corsair 128gb ssd drive with my operating system. I also have a few other hardrives. The computer is about two years old, was thinking maybe its a failed ssd drive but then i cant seem to boot from the usb pen either as thought about installing windows again on another hardrive.