Hi,

This has been happening for a few weeks now but i have noticed my Laptop has been running very slow lately. I have a decent Toshiba laptop with 16g RAM and 64bit operating system. Just today i noticed my Disc usage was at 100% and it says that windows modules installer worker was using most of it. Ive tried a full nortan scan but it did nothing. It would be great if you could help me out :)

Hi Nathan.Solari,

TiWorker.exe is Windows Modules Installer Worker. It is related to Windows Updates.

I would suggest you to take the following steps to have a troubleshoot.
1.Run the built-in troubleshoot tool to have a diagnostic.
Control Panel\All Control Panel Items\Troubleshooting\All Categories\Windows Update,System Maintenance
2. To resolve the issue with TiWorker.exe, check for updates in Windows Updates and install them.
 a.     Click on the Windows + X keys and select Control Panel.
b.     Click on Windows Updates, in Large Icons View.
c.      In the left panel, click on Check for updates.
3.Clear the windows update cache.
 net stop wuauserv
  cd %systemroot%\SoftwareDistribution
  ren Download Download.old
  net start wuauserv
  Restart the machine and manually check for updates again

4.Try the fixit tool to reset Windows update Components
 How do I reset Windows Update components?
https://support.microsoft.com/en-us/kb/971058

If the issue persists ,please check the Event Viewer (Event Viewer \Windows Logs \Application ,System ,Setup )and the "Windowsupdate.log" (Search it directly) for more information to troubleshoot this issue .If you have troubles in analyzing this issue ,we can upload them to the OneDrive and paste the link here.

Best regards