What is TiWorker.exe?

The genuine TiWorker.exe file is a software component of Microsoft Windows by Microsoft Corporation.
"Tiworker.exe" is by Microsoft. Its parent process is "TrustedInstaller.exe". Both reside in "C:\Windows\servicing" and are part of the Windows Module Installer Service. They apply Windows Update packages to the "C:\Windows\WinSxS" component store to update OS components rather than individual files. They also update the hard links into the component store found in "C:\Windows\System32" and other Windows OS directories so that Windows runs the updated component(s). Because the CPU usage of "Tiworker.exe" when it runs just after booting up is sometimes high, online advice to disable it is frequent. It should not be disabled, deleted, or uninstalled. That will prevent proper installation of Windows Update files, which may prevent crucial security updates. (The WannaCry ransomware exploited a bug fixed in an update two months before it appeared.) Microsoft Corporation introduced "side-by-side assembly" in Windows Vista to mitigate a developing DLL version conflict problem in Windows XP.

TIWorker stands for Windows Update Trusted Installer Worker Process

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 TiWorker.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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TiWorker.exe file information

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

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

Description: TiWorker.exe is not essential for Windows and will often cause problems. The TiWorker.exe file is located in a subfolder of C:\Windows (primarily C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.17709_none_fa7932f59afc2e40\ or C:\Windows\WinSxS\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.3.9600.17477_none_fa2b7d3b9b36c7b4\). Known file sizes on Windows 10/8/7/XP are 193,024 bytes (26% of all occurrences), 199,168 bytes and 17 more variants. 
The program has no visible window. The TiWorker.exe file is not a Windows system file. The TiWorker.exe file is a trustworthy file from Microsoft. Therefore the technical security rating is 15% dangerous; however you should also read the user reviews.

Recommended: Identify TiWorker.exe related errors

Important: Some malware camouflages itself as TiWorker.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example TROJ_GEN.R039C0OJP18 (detected by TrendMicro), and HEUR:Trojan.Win32.Miner.gen (detected by Kaspersky). Therefore, you should check the TiWorker.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

Windows 8.1, Bestandteil des Windows Installer
  B.Schröder   (further information)
uses alot of cpu - irritating
Windows Updates manager in Windows 8
it has a redirect file in the CBS file inside of the TiWorker.exe
On my computer, this have caused +- 372 RAM fails. Your PID is too high to be a Windows process.
it is a resource hogger
Necessary for Windows Updates, do not uninstall/remove.
TiWorker.exe is a Windows Module Installer, an official software component of Windows Update service for Windows 8 and above.
  Steven   (further information)

Rating chart

Summary: Average user rating of TiWorker.exe: based on 16 votes with 8 user comments. 4 users think TiWorker.exe is essential for Windows or an installed application. 2 users think it's probably harmless. One user thinks it's neither essential nor dangerous. 4 users suspect danger. 5 users think TiWorker.exe is dangerous and recommend removing it. 3 users don't grade TiWorker.exe ("not sure about it").

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Best practices for resolving TiWorker issues

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

TiWorker.exe [all]