Recently users have reported that their system performance was getting too low due to changes made recently and upon opening their Task Manager they saw that Perfmon.exe was using a lot of GPUalmost above 90%.
Perfmon.exe (Windows Performance Monitor)plays a major part in Windows OS.It's responsible for monitoring various performances , and other system services.
Perform a System File Check
Solution 1
1. Search “Command Prompt” in the Startup menu, then choose Run as administrator.2. Type“sfc /scannow” and wait for 20 minutes for it to solve.
1. Click on the Search icon2. Select Settings.3. Now click on Privacy & security > Windows Security
4. Select Virus & threat protection and click onQuick scan.5. Wait for the scan to finish and then restart your PC to see Perfmon.exe in Windows 11 is fixed.