Computer constantly rebooting

Posted on 2011-04-29
Last Modified: 2012-05-11
I got a client that has a  windows xp desktop that's consistently rebooting on its own since several days ago. It shuts down and turns back on by itself. It has Norton antivirus up to date on it. So I don't think it's a virus. What could be the problem do you think?

Question by:now2010
    LVL 8

    Expert Comment

    Well a couple of things but just because it has virus software doesn't mean it couldn't have spyware or malware. Have you tried booting into safemode?
    LVL 6

    Expert Comment

    Do you know if XP SP3 was recently installed (like when this happened) and the system has an AMD processor?  If so, take a look at this:
    LVL 13

    Accepted Solution

    If it just reboots, it might be getting a blue screen but you don't know it because it is set to automatically restart on a system failure.

    while it is booting, hit F8 for the windows boot menu.  Select disable automatic restart on system failure. See if a blue screen comes up when it fails.
    LVL 29

    Expert Comment

    by:Sudeep Sharma
    Check the Userinit.exe in Registry hive using the BartPE Boot CD, link below
    HKEY_USERS \ MyXPHive \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon

    How to edit the registry offline using BartPE boot CD ?

    I hope that would help


    Author Closing Comment

    I disabled reboot on system startup and the problem went away. thanks.

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