The PC just powers itself off, push the power on the PC and it restarts with no alarms or issues. Then it will run any where from 10 to 45 minutes and does it again?? This system has been online for 6 months and never have seen this problem before
In reply to Matt Stoner:
In reply to DOUG DEWITT:
In reply to Youssef.El-Bahtimy:
Another potential cause (that popped into my head as I try to sleep), may be the Windows security policy to 'Shut down the computer when the security audit log is full' or 'Shut down system immediately if unable to log security audits' is active for the domain/machine. This could explain why the problem did not surface for many months and why it is now frequent, but spaced apart by days: "Typically, an event will fail to be logged when the security audit log is full and the retention method specified for the security log is either Do Not Overwrite Events or Overwrite Events by Days"
http://technet.microsoft.com/en-us/library/cc938340.aspx
You should be getting a blue screen with this, but perhaps it is too temporal to be seen.