Dear all I have a W8K R2 server which restarts about the same time every two weeks, I have checked and no sceduled tasks are running and windows updates are configured to download but not install. Other then this issue the stability of the server is ok and the server is licensed, all power connections are ok, and recently I have unplugged the server from a UPS and plugged it into a mains socket, the patterent of the restarts shows that the server will next restart this friday. I have checked the events and I see the following event in the system logs source - kernel-power eventid - 41 The nearest log I can find in the application log before the restart is source - CAP12 eventid - 4107 Failed extract of third-party root list from auto update cab at: <http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab> with error: The data is invalid. . The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

Hello, did you see: http://support.microsoft.com/kb/2028504Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.