Stop windows update service
Type %windir%\SoftwareDistribution\DataStore in this new window and click OK.
This will open Windows Explorer on the correct location.
Delete all contents of this folder. (Hint: Use Ctrl + A to select all files and folders)
In the new windows you have a navigation on the left side. Use it to navigate to
Once you found it, search for WUServer and WIStatusServer in the right hand pane.
If they are not listet we cannot clean the download path. Othwerwise delete both.
Restart your computer.