that is not a key, that is only path to the key. you must make DWORD value or any type of values there.
this is WRITE example
Set b = CreateObject("wscript.shell")
s = "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr"
b.RegWrite s, 1, "REG_DWORD"
this is delete...