Need to remove windefend and updates from win 8

Ok, like the title says, I need to remove the following keys from my computer.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend\Security]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Parameters]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Security]...

Need to remove windefend and updates from win 8