I was using Windows 7 Home Premium 64bit normally when for no foreseeable reason it just shut down (It looked like a force shut down as it went off immediatly). After it restarted by itself and it went through the usual start up Dell screen but as soon as the time for Windows to boot came nothing happens only a flashing underscore. I haven't even been able to get the Start Safe Mode screen. I've tried an AVG rescue disk but nothing happened. I've tried to reinstall and repair Windows but it claims it cant find the drivers it needs and for some reason doesn't seem able to access the hard drive. I was curious if this was a harddrive issue so I booted up Linux Puppy from CD and I was able to access my hard-drive so it's definitivly connected to the computer. I have no clue to why this has happened so any help will be hugely appreciated.