Hi, I have a problem with the free update to Windows 10. My setup: Windows 7 SP1 x64, Athlon 64 X2 Dual Core 4200+ @2.21Ghz, 3,5Go RAM. My CPU don't have the instruction called "CMPXCHG16B" (CompareExchange128), and so, I can't to get free update to W10 because the x64 version of W10 can't run without checking this. So, I would like to install the x86 version (32bits) of W10, but I need to make a clean Install to do that. Problem, my key of W7 will not be activated/converted for W10 with this method... Any idea to resolve this issue ? Game Over ? Thanks !