Grey screen after boot

Build: Mobo Asus Z97-A CPU i7 4770 GPU GTX 970

I’ve installed macOS Success' href='/2020/12/install-macos-mojave-on-supported-pc.html'>Mojave and everything went well. But now when i try to boot it takes FOREVER to boot, and when it finally does, I get a grey screen with a mouse pointer and nothing happens. Please help!

Author: @NeroNuke