If you notice Window modules installer worker eating up your CPU, these tips might help you out.


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1) run Windows update troubleshooter

Control Panel
Troubleshooting
View All
Windows Update => Right click => Run as Administrator
Click Next
After the wizard has been run, click Close the troubleshooter

2) run disk cleanup

http://windows.microsoft.com/en-us/windows/delete-files-using-disk-cleanup

Open Administrator CMD prompt
C:\>cleanmgr.exe
Wait a few minutes for the scanning to complete.
Select only [x] Windows Update Cleanup for "Files to delete:".
Deselect everything else
Click OK

3) run dism.exe /online

Open Administrator CMD prompt
C:\>dism.exe /online /cleanup-image /scanhealth
C:\>dism.exe /online /cleanup-image /restorehealth

https://technet.microsoft.com/en-us/library/hh825265.aspx
DISM Operating System Package Servicing Command-Line Options

You can also use these servicing commands to enable or disable Windows features, either offline or on a running Windows installation.

The following operating system package-servicing options are available for a running operating system:

DISM.exe /Online [/Get-Packages | /Get-PackageInfo | /Add-Package | /Remove-Package ] [/Get-Features | /Get-FeatureInfo | /Enable-Feature | /Disable-Feature ] [/Cleanup-Image]

Use /ScanHealth to scan the image for component store corruption. This operation will take several minutes.

Use /RestoreHealth to scan the image for component store corruption, and then perform repair operations automatically. This operation will take several minutes.

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