What is netfxupdate.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 netfxupdate.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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Netfxupdate.exe file information

Windows Task Manager with netfxupdate
Netfxupdate.exe process in Windows Task Manager

The process known as NetFxUpdate Application or UpdateUtil Application belongs to software NetFxUpdate Application or UpdateUtil Application or Microsoft .NET Framework by Microsoft (

Description: Netfxupdate.exe is not essential for Windows and will often cause problems. Netfxupdate.exe is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 106,496 bytes (56% of all occurrences), 73,728 bytes or 98,304 bytes. 
Netfxupdate.exe is not a Windows core file. The program is not visible. The software starts upon Windows startup (see Registry key: MACHINE\Run, MACHINE\RunOnce). Therefore the technical security rating is 36% dangerous, however you should also read the user reviews.

Uninstalling this variant: If problems with Microsoft .NET Framework occur, you may want to uninstall the software using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify netfxupdate.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as netfxupdate.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the netfxupdate.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

part of a microsoft xp Windows\ServicePackFiles\i386
  Doug Gifford  
If located in C:\WINNT\Microsoft.NET\Framework\v1.1.4322 it is part of the Framework Application. I just installed an update and this file requested internet access immediately after installation
It is a valid file required for Microsoft NETframework 1.1
  Emmanuel Kappa   (further information)
Windows Vista blocks it on startup
Run Once follwing reboot after I installed .NET 1.1 security update 1. Looks like a key Microsoft component on the .NET 1.1 framework. Presumably not present if you went straight to .NET 2 or .NET 3
It's preventing my computer from entering standby mode, and it didn't show up until after I updated .NET via Automatic Update. I really don't think it's a necessary file.
  Jason L.  
You can disable this process. But you may need it to work with MS Visual Studio 2005.
If you're getting an error that says something like "Microsoft .NET framwork update v1.1.4322 is preventing your system from entering standby", stopping this process solves the problem and doesn't seem to mess up the computer any.
MS Windows Defender reports it as potentially dangerous & not classified !!
  David Moorhouse  
It prevents hardware & software from going to standby or hibernation on Dell system
  Dave Knight  
Found this to be not only a piece of spyware, but virus scanner disabler. I run Avast Anti-Virus and I noticed, that about 3 days after this thing kept plaguing me, my on access scanner quit working. Had to uninstall Avast, run Combo-fix to get rid of it and then reinstall Avast. This is a nasty little virus and very hard to get rid of.
My Vista doesn't block it. Good thing my dad forgot his admin password.
  SMART KID :-)  
I myself had this particular file pop up after installing net framework as a part of some game. I tracked the file to Windows\\Framework and ran a scan there with AVG, it turned out empty so I went ahead and installed it. The net framework seemed to be working so it probably isn't all that important. No hiccups as of yet
  Tommi Martin  
scanned with NOD 32, sayes its celan
I received the same prompt as everyone else after a Microsoft Net.framework update. I installed the program. I ran a virus scan, I ran a Microsoft Malicious Software Tool Removal scan, I ran Spybot, and everyone of these tools came up with nothing negative. I have had no problem with the install.
not much, but it is on my Dell reinstallation DVD
  Robert Epstein  

Rating chart

Summary: Average user rating of netfxupdate.exe: based on 18 votes with 17 user comments. 2 users think netfxupdate.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 8 users think it's neither essential nor dangerous. 2 users suspect danger. One user thinks netfxupdate.exe is dangerous and recommends removing it. 3 users don't grade netfxupdate.exe ("not sure about it").

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Best practices for resolving netfxupdate issues

A clean and tidy computer is the key requirement for avoiding problems with netfxupdate. 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 netfxupdate.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

netfxupdate.exe [all]