Doing so may trigger a flag at the Microsoft activation server. you cannot use both the old and the new Windows Product Keys at the same time (the old one still usable in case you want to downgrade). *Note: upgrading a Windows installation means the previous/original Windows version (XP/Vista/7) becomes the base/part of the new Windows license i.e. If you want to do a clean installation (instead of upgrade from Win8 RP/CP), just select the option to create ISO or USB flash drive, reboot the computer, and do the format during the Windows 8 Setup (Upgrade Product Key requires an existing Windows installation to exist during Setup, even if it's to be deleted/formatted later - or you cannot properly activate it). Go to, click Download Pro for $39.99, and proceed as usual.ĥ. Play or poke around after installation finished to comply with being a 'beta tester' (maybe not necessary ).Ĥ. Product Key: TK8TP-9JN6P-7X7WW-RFFTV-B7QPFģ. If you don't have it installed yet, get the Win8 RP ISOs from here: Solution: upgrade from Windows 8 Release Preview (or Consumer Preview) Windows 8 Pro Upgrade Promotion also covers upgrading from Win8 RP/CP besides XP/Vista/7.ġ.

I'm aware of an active thread discussing this matter in Kopitiam subforum however this is a clean, pure way (100% legal, no grey area at all). This is a tip for anyone who want to get Windows 8 Pro Upgrade at RM120 (promotional price until 31st January 2013) in a 'most clean' method possible, without needing to surrender* a (legal & valid) license on Windows XP, Vista, or 7 - not to mention 'upgrading' from illegal/pirated copy of Windows.

Windows 8 serial number onky 22