Sooo while you're computer was booting, it end up with a black or blue screen that say something that's related to "loss of file/corrupt"? Did you try booting it to "safe mode" (f8 for bootup page, depending on the PC). You can also reinstall the OS, check and see if your HDD is still working (do a memory test). If you can't boot it to anything, not even the bios setup. One or both the HDD and the motherboard is broken.