Build Application runs differently under different Windows accounts


I have a build Unity Application on a Windows 10 Computer with multiple accounts used by different people. When running the application from my account everything works fine. There is one other account from which it also works perfectly but in several other accounts there are no shadows when running same .exe file.
I’ve already tried to build it new, change player, quality and build settings as well as copying the whole project to a common folder and exporting from there. It also makes no difference if the account has admin rights on the computer or not. What could be the problem?

Thanks in advance!

In programming business applications, I’ve hit similar issues where the regional settings were different, specifically, the format of numbers including a comma instead of a full-stop, and the separator being a comma instead of a semicolon, causing a component to fail. I don’t know if that is the case here, but perhaps there are settings relating to the graphic card that are specific to a user?