The Marvel Rivals "running install script" issue prevents players from opening the game. It mainly occurs with the Steam Client version, where the client gets stuck on the running install script ...

If your Windows 10 has been stuck in an install loop since last week, Microsoft has finally released a fix-it script that you can download to enable the upgrade to fix the issues with KB3194496.

Those who have installed mods for GTA 5 may have used a tool named Script Hook V for the same at some point.