What is TrustedInstaller.exe in Windows 7 | 8

What is TrustedInstaller.exe process? Why does TrustedInstaller.exe sometimes utilize a high percentage of processor power and make my system slow? Can I disable TrustedInstaller.exe? These are a few questions I will try to answer in this post.

What is TrustedInstaller.exe process?

TrustedInstaller.exe is a process of Windows Modules Installer service in Windows 8 | 7 and Vista. Its main function is to enable installation, removal and modification of Windows Updates and optional system components.

TrustedInstaller.exe is located at C:\Windows\servicing\and its normal startup of this service is set at Manual, and it runs under the Local System Account. It has no dependencies.

At times you may find that TrustedInstaller.exe has been corruptedand you may bet an error message to that effect. In such a case running the System File Checker may help. But sometimes even Windows Resource Protection service, which runs the system file checker is affected. In such a case if you try to run sfc /scannow, you may get the error message:

Windows Resource Protection could not start the repair service

In such a case you may have to Repair Windows 7 or Refresh Windows 8.

TrustedInstaller.exe utilizing a high percentage of resources

At times, especially after you have downloaded and installed Windows Updates, on restart you may find TrustedInstaller.exe in your Task Manager consuming a lot of resources. That is normal. Just allow it to run its course.

Can I disable TrustedInstaller.exe

While there are ways to disable or remove  TrustedInstaller.exe, and these are being suggested by many sites, you don’t want to do that as it is a protected system resource. If you disable this service, Windows Updates may fail to install or uninstall!

Running System File Checker will help you replace deleted or corrupted system files.

Posted by on , in Category Windows with Tags
Anand Khanse aka HappyAndyK is an end-user Windows enthusiast, a Microsoft MVP in Windows, since 2006, and the Admin of TheWindowsClub.com. Please create a System Restore Point before trying out any software & be careful about any third-party offers while installing freeware. Add me on Google+.
  • Ash

    If you care even a bit about your system, removing TrustedInstaller.exe is actually suicide! It’s unbelieveable one would even think of doing it.

  • Guest1254

    Thanks but no thanks the service is not on the service list. And yes i replace it with a dummy file. If need i replace it back. So the service dont eat my % cpu. Microsoft is already a pain in the ass but this…. urg

  • BillGates

    I got sick of the Microsoft bloat. 3 of the 4 computers in my house now run Ubuntu with no ill effects. Micro$oft “Trusted” anything is really a joke.

  • Stevejobs

    Very true why these jokers take control of our PC. We pay money for software and OS. Just bcos it is legal i dont have admin rights cannot do anything :<(

  • Epicduel76

    im trying to uninstall internet and it says to get permission from trusted installer how do i get permission?

  • Mail

    > Why does TrustedInstaller.exe sometimes utilize a high percentage of resources?
    Right now this programm uses 2.8G ram on my machine … This program simply is badly written …

  • Forte Rocha

    well, I dont use Windows update so why I need this trustedinstaller again??

  • http://www.facebook.com/Diggerfor Tarun Kataria

    can anyone give solution for “windows explorer has stop working” error..?? please if have link here ….

  • http://www.thewindowsclub.com Anand Khanse
  • He That Is

    Why all of the silly questions? In nearly three decades, MS has failed completely to release even ONE piece of WORKING software. Why should this be any exception? I wrote the last piece of working software, I want the 96 Billion dollars now!

  • David

    Perhaps because it’s killing battery life? Duh. Tried to get some important work done on a flight yesterday, and it drained my battery quickly, so I wasn’t able to work.

  • Babyygurl70

    did you find at people had told me internet 9 is bad i can’t get it off it say what you said

  • Marvin

    Is Microsoft owned by russians? Win 7 is controlling your pc and you can´t change what you want. Communism in a nut shell….

  • Guesticles


  • ORLY

    You must be new to computing… each and every one of these services is designed to support the users and programs do their tasks. Anyone with admins rights can change each and every thing on their windows box if they want to. Not knowing how or understanding what these things do is the users fault and there’s nothing the OS can do to educate you. Bugs always occur under ANY OS (trust me i have to support a half dozen distros of linux and all versions of windows above XP). Stop trolling please.

  • shipdog7

    Don’t want to search? Press Win+R and paste in the following:
    C:Windowsexplorer.exe shell:::{d450a8a1-9568-45c7-9c0e-b4f9fb4537bd}
    then press Enter.
    wait for the Uninstall an update screen to load completely
    scroll through the list until you find Windows Internet Explorer 9
    click once to highlight IE9, then click the Uninstall button (or right-click and uninstall)
    confirm that you want to uninstall (click yes)

  • Antonio Ribeiro

    Cara estou cheio de videos curtos, que estão estalados na minha máquina, quero deletar e quando mando para a lixeira, ele me pede autorização do TrustediInstaller, como eu faço para excluir estes vídeos.

  • Swertzham

    I agree with Marvin, and get his frustration.

  • willichan

    Although I agree we could do without the trolling, your statement is wrong. Accounts with Admin rights do not have access to change everything on their box … unless they circumvent the TrustedInstaller. Some of the “Protected” files are as in-nocuous as a BMP background image (%SystemRoot%System32oobebackground.bmp). The only way to change any of the TrustedInstaller protected files is to take ownership of the file, then edit the permissions to allow yourself access. That is not something average users can (or should) do.

  • Buzzy

    Trusted installer is a piece of shit. I own the system not Trusted Installer. I deleted mine off the system and took ownership of the whole windows directory!

  • Connor Nee

    i updated to windows 8.1 and it says i need permission off trusted installer to delete the folder ‘windows. old’ if anyone could help that would be great

  • http://www.thewindowsclub.com Anand Khanse

    I suggest you use the built-in Disk Cleanup Utility to delete this folder. It works.

  • TonyG

    Trying to find a solution to “windows audio device graph isolation” “Audiodg.exe” eating my memory 55% and stalling the computer, I wasn’t even using any sound or video at the time. Followed all the advice on windows site, said download KB981013, followed all the links and eventually after installing it stated that it was not suitable for my system, windows 7 by the way. What a load of crap! There’s something going on through the back door here! It only happens when I’m on-line! I can’t delete it as I’m not a “Trusted Installer” another load of crap!

  • TonyG

    Just as a final comment, I bought my computer after this was raised as a problem in 2011, and nothing has been done about it, this is the real problem, complacency, I hope Microsoft goes bust!!

  • Potatomonger

    I must say, this app is total bull. I got a bunch of really bad viruses, and because this piece of crap wouldn’t let me remove stuff, I had to totally reset my comp. next time im buying a friggin MacBook, because obviously I cant get crap done with windows can I? Thank you for making this piece of crap ‘trusted installer’ Microsoft, because its junk. and now I cant get it off my comp.

  • Shrad

    How do you know that TrustedInstaller was the cause?
    It could be anything, like your drivers or any third party software you installed.
    Just make sure you don’t have anything that is not required at the startup.

  • How_delightful

    Updating Windows 8 is ferking SUICIDE.
    The tens of thousands of us who updated to Windows 8.1 and/or Windows Media Center now all have our MS DVD Install discs all but effing useless except as coasters.
    Unless we yet again install from scratch; in which case Microsoft want a bundle of moeny (for tech support) to help us, or they refuse to help re-register the Disc Key code after a third time trying to sort their GARBAGE out.

  • How_delightful

    I have a fresh install of Windows 8 on a blank SSD and in two days with no programs installed it has balooned to 45Gigabytes, essentially by itself.
    Windows 8 is a MONSTER.

  • Nunya

    This article is complete nonsense written by a Microsoft shill.

  • Nic Lyon

    Bump, plus for those of us who customize our OSes to the extent of recompiling the kernel… closed source means no editing the OS it’s self. Not bashing on closed source or their decision to go closed, just saying that in effect is yet an other thing you have no control over… ever wanna patch an OS bug now rather than wait for an update to patch it… not in windows, not gonna happen.

  • http://brigs.ucoz.ru/ ?????? ????????

    ??? ????????? ??? ??????????? ????? ???????, ???. ??? ???????? ?????? ???????? ????????

  • BlackKnight

    It may be suicide, but if I can’t uninstall a program it might as well be tried. Otherwise I have to format and reinstall the system anyway. Damned it you do and damned of you don’t.

  • James

    Please don’t complain then if your computer is riddled with errors and problems.

  • James

    It sounds like you’re making it much more of a hassle than it has to be.

  • James

    So did you fresh install simply to stare at it? Or are Notepad and Internet Explorer the only programs you use?

  • xrobwx

    I have upgraded 12 machines to 8.1 with none of these issues. They are running perfectly.

  • xrobwx

    Try logging in as administrator.

  • xrobwx

    Best comment! :)

  • snyderman27

    Windows Media Player starts by itself and stays on the desktop even if you x it out, it just keeps reloading itself. I tried to uninstall it, but that TrustedInstaller.exe program won’t let me. I had to go in and turn off the windows feature, so far so good.

  • DonJames Swanson

    how about all those stupid 6 second videos filling up my windows media player,trustedinstaller wont let me delete them

  • Recent Comments