@samartIT For opening Fortnite without updating - you can make a shortcut directly to the UEFN EXE located at X:\Program Files\Epic Games\Fortnite\FortniteGame\Binaries\Win64\
It’s inadvisable to do this because of the version mismatch issue I mentioned above, but there are a lot of things you can do with UEFN that don’t involve launching a session, so this might help for the context of your computer lab.