BlockInput on Logon Screen

[Tec]

Hi

I search for a way to block input at logon screen. BlockInput(1) only works if a User is sign on.

One way i found is to change the registry key "start" from kbdclass and mouclass but this needs a reboot for enable and disable.

I want to run a maintenance script (defrag, temp clean ... ) and blocked the Computer at this time and show a massage "blocked for maintenance".

At the moment I have a script that copy and starts a second Script on remote Computer over SCHTASKS.

Have someone a idea how to solve the blockinput problem without restart?

mfg Tec