i choose to update my bios using @bios the other day because i was getting an error where my cursor became double the size and crashed my gfx driver. It went well for 2 days, but yesterday it couldnt start without me using the repair tool. Today it can't start at all... it offers me the option to repair again, but when i click it and starts to load, it will just sit at a blue windows baggrund and the repair program never launches. I can enter the bios and tried to reset to defaults, but this only gave me the option to switch from IDE to AHCI at startup.
Which mode was it in when you did the original windows installation? ide or ahci? You need to make sure it's back where it was when you did the first os installation. When you get the repair tool option, is there also a start windows normally option? If so choose that. Do you still have the mobo driver disk or the os installation disk in the optical drive? if so remove them and try again.