Full message when I try to install Oblivion GOTY...

This application is not compatible with the installed operating system or machine configuration.
Please upgrade to Windows 98SE, Windows 2000 or better. Certain virtual environments are not supported. See http://www.securom.com/message.asp?m=os&c=1000 for further information.

I know my laptop meets the specs, Im on an acer windows 8.1 machine... what could the problem be?