I tried UE but after a long install it wont open; it only crashes

took forever to install, than forever to verify the installation without errors. Than I try and launch the engine and crash window pops up. Very disappointing because I was going to leave Unity ffom all its BS, but at least I am able to actually start their engine.

It would be helpful if you could post the crash reported in the window that pops up - otherwise there’s no way we can help you. What are your system specs? Is there enough space on the drive? Do you have the prerequisites installed? Too many factors involved for anyone to provide a helpful response without more input on your end.