WPFFontCache_v0400.exe High CPU Load in Windows

Process, that kills your CPU is not a normal for successful OS functioning, all such processes must be monitored all time. Often users facing with problem, when WPFFontCache_v0400.exe process loads a lot of CPU in Windows OS. Let’s take a look at what the process is and how to stop it.

What is WPFFontCache_v0400.exe process?

WPFFontCache_v0400.exe is an executable file of Windows Presentation Foundation Font Cache module, which is the part of Microsoft .NET Framework 4.0 libraries. This process is responsible for optimizing fonts visualization during the run of WPF-applications. It is cache, that keeps metadata of all used text styles and responsible for immediate visualization of users interface.

WPFFontCache_v0400.exe is not a system file, and in case you will stop it or delete that won’t do a harm to Windows functioning or performance. Therefore, the technical security rating of object is 26% dangerous and that’s not a lot.

In case WPFFontCache_v0400.exe cause high CPU load, you can be 99% sure that it is damaged.

By default, this object located in the folder Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\wpffontcache_v0400.exe and has these digital signatures:

  • MD5: 991e2c2cf3bc204c2bb2ee1476149e4e;
  • SHA-1: fa0f3372dff43749cbf52a907d260c0113e4b08f.

In case you see other digital signatures for WPFFontCache_v0400.exe, most likely your machine is infected with malware.

How to optimize WPFFontCache_v0400.exe process?

There are 2 different solutions on how to solve the problem with the process.

Solution 1: Libraries updating

WPFFontCache_v0400.exe can be damaged because of the system failure or the application errors. Damage can also occur after power outage or other power problems. In this case, all you need to do is to update .NET Framework libraries.

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To do this, follow these instructions:

  1. Go to this page and download necessary Microsoft .NET Framework 4 web installer package version.
  2. Install it on your machine.

Solution 2: Deleting the file

If previous solution didn’t help, we have an alternative one:

  1. Press Ctrl+Shift+Esc and run Task manager.
  2. Find WPFFontCache_v0400.exe in the list and stop the process.
  3. Press Win+R and type in cmd in new Run window. Press Enter.
  4. In command line run command:
    sc delete WPFFontCache_v0400.exe

    delete WPFFontCache_v0400.exe

  5. After the process finished, close the window.

We are sure, that these solutions will be enough to solve the problem with WPFFontCache_v0400.exe high CPU load. But in case problem still occurs – check your machine for infections and malware using a few different antiviruses.

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