[Solved] Windows Modules Installer Worker Windows 10 High CPU

By April Cai  Technical Tips  Windows 10   12 Comments

Does the screenshot above look familiar? If you’re on Windows 10, and you notice that the Windows Modules Installer Worker process is using a large percentage of your CPU,  you certainly aren’t the only one. We’ve seen many Windows Users are reporting this issue. But the good new is, you can fix it. We’ve put together 2 solutions you can try.

What is Windows Modules Installer Worker? 

Windows Modules Installer Worker(TiWorker.exe) is a Windows Update Service that looks for new updates and installs it to your computer. In other words, when your computer’s system is checking for Windows update or installing any update, this process will be running automatically. 

How do I fix Windows Modules Installer Worker High CPU?

Here are 2 solutions you can try to fix this problem. You may not have to try both of them; if Method 1 doesn’t work, then you can try Method 2 to resolve the issue. In addition, you can try our Bonus Tip to solve your computer woes.

  1. Stop and disable the Windows Update service
  2. Change your Internet setting

   Bonus Tip: Update your device drivers

Note: Both Method 1 & Method 2 will stop Windows Automatic update on your computer

Method 1: Stop and disable the Windows Update service

Only when the Windows Update service is running, can Windows checks or installs updates. So if we stop and disable the Windows Update service, Windows can’t check or install any update. As a result,  the Windows Module Installer Worker process won’t use a large percentage of your CPU then.

Here’s how you can do stop and disable the Windows Update service:

1) On your keyboard, press the Windows logo key  and R at the same time to invoke the Run box.

2) Type services.msc and click OK.


3) You should then see the Services window again. Double-click Windows Update.

4) Set its startup type to be Disabled and click Stop. Then click Apply OK.

5) The CPU usage on your computer should return to normal. If it doesn’t you can try Method 2 below.

Method 2: Change your Internet setting

The other way to stop Windows Automatic Update on your computer is to change your Internet to metered connection. See how:

Case 1: You’re using a Wi-Fi Network
Case 2: You’re using an Ethernet Network

Case 1: You’re using a Wi-Fi Network

1) Go to Start > Settings > Network & Internet > Wi-FI. Then click Advanced Options.



2) Tick on Set as metered connection

You’re done. Check if the problem still exists.

Case 2: You’re using an Ethernet Network

1) On your keyboard, press the Windows logo key  and R at the same time to invoke the Run box.

2) Type regedit and click OK.

3) Click Yes when prompted by UAC ( User Account Control ).

4) On the open window, go to 
HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows NT > CurrentVersion > NetworkList > DefaultMediaCost
Then Right-click  DefaultMediaCost and select Permissions.



5) Click Add...  Then type your user name into Enter the object names to select and click Check Names.
Click OK.



6) Click the user you just add, then tick on allow for Full Control.
Click OK.



7) Double-click on EthernetThen set its Value data to be 2.
Click OK and close Regedit Editor window.



8) Reboot your computer.

Now Windows Modules Installer Worker may not cause High CPU on your Windows 10.

Bonus Tip: Update your device drivers

The old or incorrect drivers on your Windows 10 can cause a lot computer woes, including this error. You can update your devices manually or, if you’re not confident playing around with drivers, you can do it automatically with Driver Easy.

Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.

You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):

1) Download and install Driver Easy.

2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.

3) Click the Update button next to all the flagged driver to automatically download the drivers, then you can manually install it. (you can do this with the FREE version). 

Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).

4) Reboot your Windows 10. Go to Task Manager to see if the CPU usage is normal.

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