Instantly Fix TrustedInstaller.exe
What is TrustedInstaller.exe?
TrustedInstaller.exe is used by or it's by itself a Windows Vista service - Windows Module Installer. You cannot use Windows update if this file is missing - error code 80070424.

Click here to fix TrustedInstaller.exe related errors and optimize Windows performance.

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Fix trustedinstaller.exe – Missing file Issue and 100% CPU issue

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What is TrustedInstaller.exe?

TrustedInstaller.exe is used by or it’s by itself a Windows Vista service  – Windows Module Installer. The file is small and its location is C:\Windows\servicing\TrustedInstaller.exe. As its name implies – Trusted Installer has rights over essential Windows Vista programs and applications. Only after the approval from TrustedInstaller.exe, a service or program is allowed by the OS to use the needed system resources – CPU, RAM, etc…

Avast Antivirus used to report this file as an infection which is a false positive.

Why do you need this file?

Its an authorizing service commonly used for Windows update. This is a system file needed by the Windows Vista!

Missing TrustedInstaller.exe!

You cannot use Windows update if this file is missing – error code 80070424. To fix that you would need to get an official copy of this file from Windows CD, and place that in the folder,  C:\Windows\servicing\. That must fix this issue.

Alternatively you can fix it with a Windows Vista recovery disk. If you don’t own a disk, here’s how to make one yourself.  Download Windows Vista Recovery Disc from and Download ImgBurn from Burn the image onto DVD with the ImgBurn, boot from it and repair. After that’s done you should have up and running.

High CPU issue!

You might have thought that this file is a malware because of its name. But its a system file. It is known to run at random time taking CPU to its 100% and slowing down the PC.

To resolve this,

Set the service “Windows Module Installer” to start manually instead of starting every time at windows load.

  1. Click on Start, type msconfig, Enter.
  2. Click Continue when User Account Control prompt is displayed.
  3. In the System Configuration window, open the Services tab.
  4. Find Windows Module Installer and clear the check box.
  5. Click OK – save your changes and exit.
  6. Now, open Services window again and change the Startuptype of Windows Module Installer to Manual.

That’s it.

Windows Vista Sp1 seems to have fixed this bug. You could also fix this issue by disabling automatic Windows update, but that’s something I would not recommend you to do it.

By now you should know how to get it back if its missing, or to fix the high CPU issue.

Recommended Download: Scan for Your PCs missing file or fix buggy file with a Registry Optimizer Tool

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