The perfmon.exe process is responsible for the Windows Performance Monitor and has been known to use up a large portion of CPU resources. As this process is responsible for monitoring various performance elements on your system, it may be necessary to utilize significant resources. Regardless, it should never be consistently showing 90% utilization or more for an extended period of time when it is functioning properly.

File name: Perfmon.exe
Application: Performance Monitor
Publisher: Microsoft
Rating: 4 stars based on 78 votes
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