The name of the process that you get installed on the machine when you run the file wpffontcache_v0400.exe is Windows Presentation Foundation Font Cache. The process is associated with Microsoft .NET Framework. The file actually serves as a function optimizer for the font application. Simply put, the process enables fonts to load much faster. Occasionally however, users experience CPU slow down because of the file. It was reported to use up almost 100% of CPU memory. The file was found to be corrupt when it behaves this way. It was also found the some users did not have the updated version of the software, which is why CPU memory consumption spiked up. To locate the file, you can check it in its default folder, C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\wpffontcache_v0400.exe. Its approximate file size 996.84 KB, with image hashes of MD5: 991e2c2cf3bc204c2bb2ee1476149e4e, and SHA-1: fa0f3372dff43749cbf52a907d260c0113e4b08f. Version 4.0.30319.1 is compatible with Windows Vista. Original file name is wpffontchache_v0400.exe.mui.

Most non-system processes that are running can be stopped because they are not involved in running your operating system. wpffontcache_v0400.exe. is used by Windows Presentation Foundation Font Cache, If you shut down wpffontcache_v0400.exe, it will likely start again at a later time either after you restart your computer or after an application start. To stop wpffontcache_v0400.exe, permanently you need to uninstall the application that runs this process which in this case is Windows Presentation Foundation Font Cache, from your system.

After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.

The ReviverSoft experts have not yet reviewed wpffontcache_v0400.exe

A process usually a part of an installed application such as Windows Presentation Foundation Font Cache, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.

We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.

The first thing you should do if wpffontcache_v0400.exe. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that wpffontcache_v0400.exe, belongs to, in this case Windows Presentation Foundation Font Cache