hi alls I bought a new PC with Windows 8 WMC X 64 oem. I have a backup plant. I have taken and enjoyed Windows 8.1 9600 but I do those not lose my manufacturer's warranty. I'm a geek Hey Yes that which the had believed? I can upgrade to Windows 8.1, I know how to do. But is that I can install Windows 81.9600 in dual and used my genuine key? Or use the backup of my old Windows activated by phone. At worst, I do the restore factory warranty or backup activation. I have original on my INTEL IE3 4GA memory Ram. It is interesting to 8 GA, Or i wait October 18 This everything. i hope that you understand that i mind. regards. Wiki.