Windows modules installer worker, what is it?

Windows modules installer worker
Windows modules installer worker

Windows Module installer worker is a module that is part of the Windows 10 package allowing real-time updating of the operating system. It allows you to update, modify or uninstall programs and functions of Windows 10.

This program may appear in the task list as the Windows module installer worker process and is the program TiWorker.exe.

Problems with Windows module installer worker

It may happen that this program uses a very large part of the CPU (more than 50%) making thevery slow computer and giving the impression of strong instability. This phenomenon occurs when Windows 10 has just downloaded the updates (usually once a month).

Typically, as soon as updates are downloaded, CPU usage returns to normal. However, there may be times when this process keeps a high level of activity even when the updates have been downloaded and incorporated into the Windows 10 system.

Fix the Windows module installer worker problem

Under no circumstances should the Windows module installer worker process be deactivated: this will seriously disrupt the functioning of Windows.

Microsoft offers to take the following steps to resolve the issue.

A. Open a command prompt in Administrator mode.

See the 4 operations on the following screen to open a command window in Administrator mode.

  • Click on the Windows icon at the bottom left of the screen
  • Type "cmd" on your keyboard
  • Right click on the line [Command prompt]
  • Choose [Run as administrator]

B. Scan Windows 10 System File Health

Once the Administrator command window is open, type the following command:

DISM.exe / Online / Cleanup-image / Scanhealth

The operation takes between 10 minutes and 30 minutes (depending on problem detection (or not) and allows you to analyze the health of Windows 10 without making any changes.

If the scanning operation does not find any problem, go directly to the system scan (in point D).

C. Windows 10 system repair

Still in the same command window, run the following command:

DISM.exe / Online / Cleanup-image / RestoreHealth

Operation which can take again several tens of minutes.

D. System scan

Still in the Administrator command window, run the command:


This operation will scan the system and if necessary perform the necessary operations in stride. This operation can also take a little time.

After all these operations, it is recommended to restart the computer in order to correct the problem. Windows modules installer worker.