I have been running CV10 on a Windows 7 OS in XP Compatibility mode. I recently had to get a new work computer which came with WIN 8.1. I can not get CV10 to load as it keeps giving me a "required system" error saying I need Windows 2000 OS. That is not an option in the compatibility tab and selecting XP SP3 doesn't work either. Is running a Virtual machine my only option at this point? Windows 98 and Windows ME were options however. Can I install CV8 and "upgrade" again to 10 with the earlier option? Anyone tried this?