BEST FIX: High CPU Usage By TiWorker.exe

TiWorker is a WMI (Windows Modules Installer) Worker Process which is related to Windows Update. Usually, the error occurs after an update has run. In this fix, i will list 5 methods which you can use to attempt and stop tiworker from consuming your CPU.

If a process, is utilizing the entire or a portion of CPU, then it can slow down the computer and the performance of apps running on it. It can also overheat the CPU since it’s constantly utilizing all available threads to process the requests by the process which in this case is TiWorker.exe

Method #1 Repair Corrupt Files

Download and run Reimage Plus to scan and restore corrupt and missing files from here, and then see if the usage by the process TiWorker.exe has dropped, If not, move to Method 2

Method #2 Run System Maintenance

Hold the Windows Key and Press X. Choose Control Panel.


Choose Find and Fix Problems and then click View All from the left pane.


Choose System Maintenance and Click Next.


Let the troubleshooter run. After it has finished, check to see if the problem has been resolved or not.


Method #3 Run Windows Updates

On a Windows 8/8.1 System Check for updates manually and install them.

Again, hold the Windows Key and press X and then choose Control Panel.


Click/Tap windows updates and from the left pane, click on Check for updates.


on a Windows 10 Computer, Press Windows Key + A, then choose All Settings. Select Windows Updates from the left pane, and click Check for Updates

check for updates on windows 10

Method #4 Clean Boot Your System

For clean booting your PC, please refer to this post: Clean Boot

Method #5 Run System File Checker

Run System  File Checker. Hold Windows Key and Press W then type cmd in the search box

Right click on cmd and select Run As Administrator


You will get a black command prompt as shown above.

In this command prompt window, type sfc /scannow and hit enter.

This will take 30 to 50 minutes, after it finishes you will get one of the two messages:

a) Windows Resource Protection did not find any integrity violations (no further action needed, if this is the message you get)

b) Windows Resource Protection Found Corrupt Files (etc…) if you get a long message with starting  lines as Windows Resource Protection Found Corrupt Files.. then in the same command prompt window, type and run the following command


Dism /Online /Cleanup-Image /RestoreHealth

You will be notified on your screen after the clean up operation has completed. Reboot your PC and then test.

Some users, also reported high cpu usage issues with system and compressed memory, if you spot system and compressed memory consuming too much of your CPU then check out the system and compressed memory guide.


  1. Perfect!!!!! I paid to geeksquad for fixing this and when they couldn’t I searched online and found this guide; happy to say that it was very easy to follow for a non techie like me.

    Thank you

  2. Thanks Kevin. I found info to run the system file checker awhile ago but no info on how to fix corrupt files — until I found your page. So I’ve run SFC again and got the message: “…found corrupt files but was unable to fix some of them….” I then entered the command: “Dism/Online/Cleanup-Image/RestoreHealth” as you suggested.
    It completed the command (shows 100%), but now I get a new error message:
    “Error: 0x800f081f
    The source files could not be found. Use the “Source” option to specify the location of the files that are required to restore the feature. For more information on specificying a source location, see
    Any suggestions?

  3. Hi windows …..
    this is one of your failures

    go to MAC, they have one even better

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Expert Tip

BEST FIX: High CPU Usage By TiWorker.exe

If the issue is with your Computer or a Laptop you should try using Reimage Plus which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Reimage by clicking the Download button below.

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