Removing $Windows.~BT & $Windows.~WS Folders

$Windows.~BT & $Windows.~WS folders are created after an update to Windows 10 and are temporary directories taking a lot of space. They can safely be deleted.

1. Run a DOS (cmd) console as administrator.
2. Execute:
1. takeown /F C:\$Windows.~BT\* /R /A
2. icacls C:\$Windows.~BT\*.* /T /grant administrators:F 
3. rmdir /S /Q C:\$Windows.~BT\

Remove anything left manually from the file explorer.
Thanks to TheWindowsClub.