Yesterday I installed a new C drive, after many shenanigans I got it all to work. There are 2 Hdds on the PC. I shutdown last night and rebooted this morning - no problems. The wife has just been surfing on the net when the PC begun to hang - Cntl/Alt/delete, task manager didn't work so she switched off the PC by holding in the button. When she tries to reboot, a disk boot failure insert system disk message starts to appear. The Hdds were being detected until this forced shutdown! Can anyone tell me what has happened?