Warn when running as admin/root
Morrowind, being created before UAC, is often started with administrative privileges. The advice to "run it as admin" if something is not working is common in the community, and the advice is extended to OpenMW. OpenMW, however, should not be running with elevated privileges.
I propose we add a warning pop-up to OpenMW, OpenMW-CS, and the Launcher that tells people they're doing it wrong. Similar to certain Linux applications that will tell you not to run them as root.
https://learn.microsoft.com/en-us/windows/win32/api/securitybaseapi/nf-securitybaseapi-checktokenmembership https://linux.die.net/man/2/geteuid