net stop wuauserv — This stops the Windows Update service.
cd %Windir%\SoftwareDistribution — Switches to the SoftwareDistribution directory of the Windows installation.
del /f /s /q Download — Deletes the Download folder of the SoftwareDistribution directory with
/f — force the removal of read-only files.
/s — include files in subdirectories.
/q — in quiet mode to surpress prompts.
net start wuauserv — Starts the Windows Update service.