I get this error all the time. The ASP.NET worker process will hang with 100% CPU used. It can be shutdown by calling "iisreset" and watching for the ASP.NET worker process to stop. The event logs show:
Event ID: 0
The description for Event ID ( 0 ) in Source ( CLR ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Failed to CoCreate profiler..