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PresentationFontCache.exe hogging 50% CPU

Ran into an issue where in Windows 7 x64 the PresentationFontCache.exe process was taking an excessive amount of CPU resources and would not stop even after a clean boot. Here are the steps I took to resolve this:
[step 1] Click start and type services.msc into the search bar. Now find the Windows Presentation Foundation Font Cache 3.0.0.0 service.

[step 2] Stop the service and make sure it’s startup type is set to Manual.

[step 3] Navigate to C:windowsServiceProfilesLocalServiceAppDataLocal (or just cut and paste the path into any explorer window). NOTE – You may be prompted to allow this, just click OK. Locate and rename a file called FontCache3.0.0.0.dat to FontCache3.0.0.0.bak. Or simply move the file to your recycle bin (don’t delete it unless this procedure is successful in re-creating the file).

[step 4] Start the Windows Presentation Foundation Font Cache 3.0.0.0 Service, wait 15 seconds, then re-start the service. A new file called FontCache3.0.0.0.dat should be created automatically. If this happens, you can stop the service and safely delete the original file you had renamed to FontCache3.0.0.0.bak.

That’s it.

December 12, 2011

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