Juh, did you mean me to type all of that in one go? It's not accepted in any case - I've probably not copied it correctly.
"C:\Windows\System32\cmd.exe /k %windir%\System32\reg.exe " in one line comes back with REG/? for syntax. but that's unaccepted.
Is "ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 1 /f" meant to be 'added' afterwards?