Servers by jDrones

Can somebody please tell me how to download Ardupilot WITHOUT the installer?

I have a school computer. So i cannot operate most installers. Please. Somebody help me.

Don’t know what you mean by “the installer” but Stable downloads are here (for Copter, similar for Plane, Rover). Pick the Flight Controller then the version of file you want (.apj, .hex., with_bl.hex).
https://firmware.ardupilot.org/Copter/stable/

What’s the Rant?

Do you mean mission planner?
There’s a zip download that you can unzip and run from wherever you like, but I haven’t tried that lately
QGC had an appimage download that works without installing.

you can download a zip file from here
https://firmware.ardupilot.org/Tools/MissionPlanner/

Has error. The same error as described before in another post.

Servers by jDrones