I found my old HP pavillion7905, and decided to start her up again. I turned it on, and it told me that it could not find the os. i looked at what little options the bios had, and everything seem ok. So, guessing maybe the os had been damaged or whatever,i tried reinstalling xp. The first couple of times it froze while trying to load a kernel debugger file, until it finally worked. it installed itself, rebooted, and continued the installation, but froze before even asking for regional information. i reset the computer, and it told me a system file was missing/corrupted. after that, everytime i tried to install xp, id get the same message. wondering if it was my windows cd that was bad, i hooked up the hdd to my computer (the one im using right now), and installed windows with no problems whatsoever. ruling out the xp cd or the hdd, i systematically checked all the compnents of my old pc. memory was fine, video card was fine, and i seriously doubt the sound card was causing the problem. i even cleared the cmos, but nothing helped. so that leaves the mobo in question, but i seriously cannot think of anything that i did to it to stop working all of a sudden. the only thing that comes to mind is that the psu i am using came with a case, so its pretty iffy, but the pc needs barely 200 watts, and the psu is rated at 400. plus i actually thing this psu is better quality that the lightshows hp puts in their system...