Hey guys I have a question, this has happed 2 times. I got in last night from the Mavericks game and my pc had shutdown, i try to bring it up and all it will do is get to the XP splash screen, light up my HD light and then reboot. I've tried last know good config and all safe mode options and no matter what it reboots everytime, can't get in at all. When i tried the safe mode it shows what files its loading, it get to a file called MUP.SYS and then hangs and reboots. ANyone seen this or have any ideas on how I can repair this ?

Do you have automatic restart enabled in my computer/properties/advanced/startup and recovery, if so any stop error disappears immiediately and system reboots, I believe autorestart is enabled by default. Perhaps the cause of the problem is being hidden by this. Just a thought......

I'm having the same problem but it happened after i replaced the winlogon.exe file in windows\system32 for the activation patch. Now i can't get into anything, including safe mode and i didn't make a backup of winlogon.exe so i'm stuck, and i don't realy feel like re-installing windows xp. can anyone help me or send me the origanial winlogon file so i can get on my way. Thanx