Citrix Load Evaluator Memory/CPU Utilization at 100%

If you come across one or more of your Citrix Servers Load Evaluator reporting memory/cpu utilization at 100% but there is no one logged onto the server. A possible cause is a patch which was applied to the server. Try the below to  resolve:

1) Copy the following file from a Citrix server which is working %systemroot%\System32\Perfstringbackup.ini to the same location on server experiencing  the issue.
2) Open a command prompt on the server experiencing issues and type lodctr /R:perfstringbackup.ini
3) Reboot the server

The above should resolve the issue. If not follow http://support.microsoft.com/kb/300956 to rebuild the Performance Counter Library.