What is PresentationFontCache.exe?

PresentationFontCache.exe is Windows Presentation Foundation Font Cache Service.

This file is part of Microsoft® .NET Framework and is responsible for the graphical subsystem. PresentationFontCache.exe is developed by Microsoft Corporation. It’s a system and hidden file. PresentationFontCache.exe is usually located in the %WINDOWS% sub-folder and its usual size is 36,864 bytes.

How to fix PresentationFontCache.exe High CPU Usage

PresentationFontCache.exe is known to cause high CPU usage on both Windows 7 and Windows Vista computers. This usually happens because the cache created by the Windows Presentation Foundation service gets bloated and starts hogging the whole system. Fortunately, this problem is easy to fix. First of all you need to ensure that hidden files and folders are shown on your system:

1. Click on Start and go to the Control Panel
2. Navigate to Appearance and select Folder Options
3. Select the radio button to show hidden files and folders

Now let’s address the problem:

1. Open the Task Manager (Ctrl+Shift+Esc), go to the Processes tab and kill the PresentationFontCache.exe process
2. Open Windows Explorer and navigate to C:\Windows\ServiceProfiles\LocalService\AppData\Local
3. Locate the file named FontCache3.0.0.0 and add .bak to the .dat file. This will back up the file just in case you need it in the future
4. Delete the FontCache3.0.0.0 file
5. Reboot your PC