What is WPFFontCache_v0400.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the WPFFontCache_v0400.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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WPFFontCache_v0400.exe file information

Windows Task Manager with WPFFontCache_v0400
WPFFontCache_v0400.exe process in Windows Task Manager

The process known as Windows Presentation Foundation Font Cache (version belongs to software Microsoft .NET Framework (version 4 Client Profile, 4 Client, 4) or Windows Presentation Foundation Font Cache by Microsoft (

Description: WPFFontCache_v0400.exe is not essential for Windows and will often cause problems. The file WPFFontCache_v0400.exe is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 754,856 bytes (56% of all occurrences), 753,504 bytes and 10 more variants. 
The program has no visible window. The WPFFontCache_v0400.exe file is certified by a trustworthy company. The WPFFontCache_v0400.exe file is not a Windows core file. Therefore the technical security rating is 22% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall the program Microsoft .NET Framework 4 Client Profile or Microsoft .NET Framework 4, update it, or try to get help from the software vendor. Click on to update it, click on to visit the vendor's website, or click on Microsoft .NET Framework 4 Client Profile or Microsoft .NET Framework 4 in Windows Control Panel (section Software or Programs) to uninstall it.

Recommended: Identify WPFFontCache_v0400.exe related errors

Important: Some malware camouflages itself as WPFFontCache_v0400.exe. Therefore, you should check the WPFFontCache_v0400.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

There is a newer Version "4.0.30319.1014" of the file, sized 754.856 bytes, file date on my disk is 2013.07.20
  HH Witte  
I have never seen this file in my task manager processes tab until I had to download the Garmin Express application so I could register my new device. Even though I have closed that application and unplugged my Garmin GPS from the computer, this file continues to sit in my Task manager taking up valuable resources. I am not happy that Garmin required me to download this app to register my product and now that it has depleted my resources is even more aggravating.
I am quite sure i got that one this time (had it before but dont rember from where, what it did or any useful info)from SimRaceWay wich is a game for download and alot things in nit using internet and other things im quite sure of. Though the "manager for the game" is starting with windows and is not needed and i can close it but still this Mother is there and if i close it manually it starts again (may be something update-crap) but if it dont update it should not be used is my opinion. the other day I had total bogg down on FB when listen to musicvids and the adobeplayer crashed, still i cant tell as you never know (i have 100's enemies in Race-07 small evilminded roaches sitting in thier closets do what they do and i am the most annoying "deceny for online trust"-cop they met so i dont know if they try to "kill me as during 7 years i met the most mental freaks ever (and i met alot weirdos in my life. Sorry i lost the thread a bit, but as i had it before and got suspiciuos as well as know it havent caused me me any noticeable problems really. I think its harmless as such but anyway a PainInTheAce
This article - 3 out of 5 stars helpful but not that helpful. However... I don't know whether it is dangerous or just annoying. It has been running on my cousin's ill-maintained XP machine for 10 hrs now at 50% cpu. She has AVG and that has not reported a problem. I'm going to kill it. So there.
  Andy North  
Update: The problem seems to be that 1) This file/service comes from MS .Net Framework 4. 2)MS .Net Framework 3.x also has a similar service Result: They fight. Good ol' Microsoft. Solution thus far: Start Task Manager (XP - right-click on a blank area of the Task Bar and click Task Manager). The Task Bar is the strip, usually at the bottom of the screen, that contains the start button, the time and other icons. In Task Manager, click on the Processes tab, then click once and then again on the CPU column header. WPF... will now be near the top. Right-click on it and click End Process Tree. I had to do this three times before it finally died. Now, to stop the .Net 3/4 conflict, right-click on My Computer and click on manage. Click on the + next to Services and Applications and then click on Services. The right-hand pane will then display all services. Scroll down to Windows Presentation Foundation Font Cache. You will find a two versions, one Started and one Starting. I cannot see the point in both so I disabled the v3. Right-click on the v3 entry and click Properties. In the Startup Type drop-down, select Disable. FYI: Manual means that the service is not started unless it is needed. Automatic means always start at every boot. See elsewhere on the net for deleting the Font Cache. If you do this, I would recomend stopping and disabling both services, deleting the cache, set v3 to Automatic, let it run, re-boot, set v4 to Automatic and let that run. Now that you know about Services, you can set the less-annoying, unless you're gaming, JQS service to Manual. Finally, if you didn't understand this comment, go back and read it again, slowly.
  Andy North  
it is a process of kaspersky products found on windows products. It is safe to let it run.
  saurav   (further information)
If you remove the file, it will automatically try to install itself again from MS Update. Checking the "don't install this update" does'nt help. It will persistently come back on next reboot. - For this reason alone, I'm convinced it's somekind of add/spy/malware, .. maybe from MS. I took the advise from above, and uninstalled the .NET Framework 4 client. All my apps still seems to be working.
  Jesper, Denmark  
I have WindowsXP and Panda Free Antivirus 2017; I noticed this problem only happens when Panda ask me about scanning a USB device that has been just plugged in; I had to disable this notification (in Panda configuration) to get rid of this. I thought I could just uninstall it, but Panda needs .NET 4.0 to run.
  Loyan Dunn  

Rating chart

Summary: Average user rating of WPFFontCache_v0400.exe: based on 12 votes with 8 user comments. 2 users think WPFFontCache_v0400.exe is essential for Windows or an installed application. 3 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user suspects danger. 4 users think WPFFontCache_v0400.exe is dangerous and recommend removing it. 2 users don't grade WPFFontCache_v0400.exe ("not sure about it").

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Best practices for resolving WPFFontCache_v0400 issues

A clean and tidy computer is the key requirement for avoiding problems with WPFFontCache_v0400. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the WPFFontCache_v0400.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

WPFFontCache_v0400.exe [all]