i cant install windows 8.1 or 10 on my pc

[Ishaq Khan]

Hello everyone... I posted this thread earlier but no replies , my pc is giving a problem that i cant install Windows 8.1 or Windows 10... i am currently using Windows 8 pro... it says that my pc does not support compare exchange128.

 

[Osprey]

Microsoft confirms some older AMD processors do not support Windows 8.1

(It applies to Windows 10 as well.)

 

[LMiller7]

The CompareExchange128 instruction requirement was added for Windows 8.1 and latter to run a 64 bit OS. There is no possible workaround. You should be able to install a 32 bit OS but this is hard to tell for sure from your unknown system specs. Posting system specs, particularly what CPU you have, would help.