only way i could get wuauserv to stop (Windows 10)...
win key then type Services, then find "Windows Update" (this is wuauserv) ... & right click...change Startup Type=Disabled, then reboot
when your system reboots then wuauserv will be disabled and not running,
so now stop other services using admin command prompt
net stop MSIServer
net stop cryptSvc
net stop bits
now rename directories
ren C:\Windows\SoftwareDistribution SoftwareDistribution2.old
ren C:\Windows\System32\catroot2 Catroot2a.old
now start up those services
net start MSIServer
net start bits
net start cryptSvc
net start wuauserv (will give following error) just go back in to Services and change Startup Type to Automatic and click start
System error 1058 has occurred.
The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.
now check for updates Win+I, then "Update & Security", then Windows Update