I'm currently working on a friend's computer that had a dead motherboard. I just installed a brand new mobo and moved all the memory, CPU, heat sinks, hard drive, etc. over from the old board. This is the first time I've done this before, so naturally I figured there'd be some initial hangups, and sure enough...

The computer now boots (yay!), but I can't get the OS to load (I think it's XP, not sure since the computer wasn't bootable when they handed it over to me). The typical "choose mode for Windows to boot into" screen comes up, and first I told it to boot to the last known good configuration. Computer reboots, and returns me to that screen. Repeat. Never boots into Windows. Tried going into safe mode instead, no luck.

I figure it's an issue with identifying the new mobo since I just moved everything over to it. What else do I need to do? Update BIOS perhaps? Tweak a config setting? I figure it's gotta something remotely simple to get it to boot up into Windows...