Hi 1. I have installed in november Windows 8 PRO WMC (using data.dat illegal) thanks to http://forums.mydigitallife.net/threads/35650-Creating-a-Windows-8-AIO-with-Media-Center-manually and http://forums.mydigitallife.net/threads/36058-Windows-Download-Integrator, and i use my free key upgrade promo WMC. 2. I have today my Windows 8 PRO legal with my key. 3. Can use my legal key Windows 8 PRO with my legal free key promo WMC without reinstall my system? What do i do?