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regsamp

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Windows computer keeps rebooting on its own

A Windows XP Pro machine that we have will just keep rebooting right after the Windows logo.  The computer will boot into Safe Mode but that is it and a system restore has not done anything.  Any assistance offered would be greatly appreciated.  
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regsamp

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No, have not run Antivurs yet.  Doing so now and it does stay in safe mode for an extended period of time.  Windows system restore was done and says it worked in safe mode but still will not boot up normally.  Tried Last Known Good Config and chkdsk and nothing reported as an issue and still does not boot up normally.  
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All the fans on the unit are working fine and the power supply seems okay and the pc temperature seems okay.  
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The system has been up in safe mode for over an hour while I have been running scans.  
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System reported once a stop error of c00002100 "The Session Manager system process terminated unexpectedly with a status of oxc0000dbc"  
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Well, have tried everything in the links that were posted here, last known good configuration, chkdsk, scandsk, virus scan, repair, System restore, copy missing dlls, system files, checked the hardware, checked the drivers and then some and the system keeps saying it is missing a dll and you copy that over and then the same thing with another file, and another, etc.  At this point, will just format and start over.  
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Have you recently installed SP2?
regsamp,

above you posted:  
"System reported once a stop error of c00002100 "The Session Manager system process terminated unexpectedly with a status of oxc0000dbc"  

But it looks like you weren't very careful with transcribing this information because c00002100 is not a valid stop error.  Could it have been c0000210 or c000021a?

Also, please confirm the "status of" code, which is also not a valid code because the first character is most likely a ZERO.

Jeff
TechSoEasy
By the way, this information is critical to diagnosing your problem.

Jeff
TechSoEasy
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Blue screen was appearing when rebooting, ran recovery console and fixmbr.  SP2 was not recently installed.  Reinstalled Windows and the system is fine now.  Also replaced the RAM.  
well, with all of that being done, it's hard to figure out what happened... but I guess you really don't care much about that now that things are fine... :-)

Jeff
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Ram tested and it was bad and the system was missing dll after dll and you would copy one over to the system and it would need another and another so after seven times I just decided to format it, replace the RAM and start with a new install.  
>>  Ram tested and it was bad   << as i suggested