What is TrustedInstaller.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 TrustedInstaller.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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TrustedInstaller.exe file information

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

The process known as Windows Modules Installer belongs to software Microsoft Windows Operating System or Betriebssystem Microsoft Windows by Microsoft (

Description: TrustedInstaller.exe is an important part of Windows, but often causes problems. The TrustedInstaller.exe file is located in a subfolder of C:\Windows. Known file sizes on Windows 8/7/XP are 194,048 bytes (45% of all occurrences), 204,800 bytes and 9 more variants. 
The TrustedInstaller.exe file is a Windows system file. The program has no visible window. The file is a Microsoft signed file. Therefore the technical security rating is 2% dangerous, however you should also read the user reviews.

Recommended: Identify TrustedInstaller.exe related errors

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

rustedInstaller.exe high CPU usage problem happens in random, and normally only last a few minutes.Dont worry. let it happen wait for 2-3 min.
  Engine steve   (further information)
TrustedInstaller.exe is the Windows Module Installer program used in the Windows Vista operating system. The process works in conjunction with Windows Integrated Update in Windows Vista.
  Alex   (further information)
You cant install SP1 on Windows Vista if you disable it but it can use 100% CPU sometime.
keeps adding media files that are just names
I gave it on my computer and it is not signed. It iis now going in Comodos sandbox.
  Wild Billl  
It was a virus, somehow my freinds sended it to me, and it gave all the rights to manipulate my computer. if that happens, give its rights away.
programe remover
It prevents me from removing unwanted files
  fred brown  
its a trojon and is running in seperte memory space no security software has been able to remove itthey end in .ink, user is system
  naomi vickery  
Corrupted a file needed to turn on my laptop. REMOVE AS SOON AS POSSIBLE! I have a new desktop and I checked in the Processes tab and it wasnt there, therefor IT IS NOT NEEDED!!! REMOVE IT!
Caused me to be unable to make changes to certain folders such as syswow64. Removal is possible
  Nathan Z  
It is the nt admin, the super user of windows 7 & 8
This program has taken away my rights on anything, moderator status and all else, i cant delete it nor all the spam and ads and unwanted programs it keeps adding, i am growing impatient with this "trustedinstaller" as i cant remove it nor its parts, if someone knows how to remove it without installing anything else, without really doing anything but deleting it i would be happy to know, as this is just a dumb virus file.
  Lucas Kærlykke  

Rating chart

Summary: Average user rating of TrustedInstaller.exe: based on 34 votes with 14 user comments. 8 users think TrustedInstaller.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. 11 users suspect danger. 10 users think TrustedInstaller.exe is dangerous and recommend removing it. 4 users don't grade TrustedInstaller.exe ("not sure about it").

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Best practices for resolving TrustedInstaller issues

A clean and tidy computer is the key requirement for avoiding problems with TrustedInstaller. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the TrustedInstaller.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

TrustedInstaller.exe [all]