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Please note, Optimum 11 26H1 is based on a Canary Channel build of Windows 11. Canary builds may exhibit bugs or limitations not normally encountered in Public Channel builds (like 25H2).

 

- With that said, I hope you enjoy this release! -

 

• Windows 11 26H1 will only run if you have a CPU that support the SSE4.2

instruction set. What does this mean? It means you need to make sure

your CPU supports SSE4.2 before installing it on your PC, because it

will not run if your CPU lacks SSE4.2 support.

 

• SSE4.2 was first introduced in the Intel Nehalem core in November 2008.

The first AMD CPUs with SSE 4.2 support were launched in October 2011.

 

• To check if your CPU supports SSE4.2, download and run CPU-Z from the link below, and check to see if SSE4.2 is listed in the CPU instructions info as shown in the picture.