If we are talking about Windows (you wrote PC) maybe you can try this. There is a process "wininit.exe" which is visible under user with Administrator rights only but is present on all Windows sessions.
I think you can try to detect whether this process is present on system. For user with standard privileges return value will be false. For user with administrative privileges return value will be true. I think so
According to https://support.f5.com/csp/article/K15302653 article "Starting with BIG-IP 13.1.0, you can use the inspector service in lieu of administrative privileges" but I think you can try to open registry key HKEY_LOCAL_MACHINE\SAM\SAM. Windows user without admin permissions receives error opening this key