I turn off my comp every night before I go to bed. But every morning when I turn the comp on I get an error saying that my system32\windows\system file is currupted. After that it will reboot about 3-5 times before it loads xp. But once it loads I can turn it completely off and restart it how many times i want and I won't get this error again, at least until I turn it off at night and turn it on in the morning. I don't understand why it only happens when the power is shut off for a long period of time. I have xp home sp2. I have repaired it. I've tried formatting the drive and do a clean install. I have three other comps I've built like this one but never ever had this problem before. Sorry this is long. Gigabyte K8NSC AMD Athlon64 3500+ socket 939 1GB DDR400 on dual channel 160GB SATA 256MB 8x AGP 450W power supply NEC 3240 DVD Writer(IDE) Sony 52x Rom(IDE)