If you're not comfortable with using's ASUS's own uninstaller to get rid of Armoury Crate (and reinstall it) then you can follow this guide of mine on Reddit and disable AC while you try out G-Helper (open source AC replacement, much more stable and ...
Do you have an undervolt applied via BIOS? That usually is the case for when a laptop won't boot after installing new RAM. There's loads of threads on Reddit about Strix G18 (2023) not booting when there was a UV applied via BIOS. Disabling the UV fi...