tiworker is the windows Trusted Installer.
Maybe some update keeps trying and failing to complete. Just a guess.
I might open command prompt admin or powershell admin and run these commands to cleanup(delete) the updates folders/files.
First try analyzing component cleanup and if it says to, run the cleanup;
DISM /Online /Cleanup-Image /AnalyzeComponentStore
Dism /Online /Cleanup-Image /StartComponentCleanup
Then the updates cleanup, followed by Restarting the computer.
paste them all in at once is OK, one will fail, that's OK too;
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
Del C:\ProgramData\Microsoft\Network\Downloader\qmgr*.dat
Del C:\Users\All Users\Microsoft\Network\Downloader\qmgr*.dat
Ren C:\Windows\SoftwareDistribution SoftwareDistribution.bak
Ren C:\Windows\system32\catroot2 catroot2.bak