I am currently running Windows NT 4.0 and Exchange 5.5. I have been trying to start the performance monitor but I am getting an error and the monitor is hanging. The error is: Event Type:Error Event Source:Perflib Event Category:None Event ID:1008 Description: The Open Procedure for service "MSExchangeIMC" in DLL "G:\EXCHSRVR\bin\imsperf.dll" failed. Performance data for this service will not be available. The Status code returned is the first DWORD 0. I have gotten a solution from Microsoft in Microsoft Knowledge Base Article - 256927 which is giving me a procedure to follow but I do not know implications it will have on my IMC. Could someone who has done this before assure me that it is not a dangerous procedure. regards DISCLAIMER: This message and any attachments are confidential and may be legally privileged or otherwise protected from disclosure. Although the necessary precautions have been taken, Kenya Airways does not accept legal responsibility for any damage whatsoever that is caused by viruses being passed or for the contents of this message. This message, and any attachments, are intended solely for use by the named addressee. If you are not the intended recipient, you must not copy them or disclose their contents to any other person. If you have received this message in error, please notify the sender by return e-mail and delete any attachments accompanying it immediately.