Youngsters might not be aware...
But Windows NT (which is the basis of all Windows after Win 9x) has been implemented on many processors in it's lifetime, I well remember sorting through the CDs for the x86 ones.
More info' here - https://en.wikipedia.org/wiki/Windows_NT
"...the name was taken from the original target processor—the Intel i860, code-named N10 ('N-Ten')..." and "Various versions of NT family operating systems have been released for a variety of processor architectures, initially Intel IA-32, MIPS R3000/R4000, and Alpha, with PowerPC, Itanium, AMD64 and ARM supported in later releases."
With a uniform OS API and code written almost entirely in high-level compiled languages, there is no problem porting an application to any particular processor, it's nothing new and no big deal.
Having a range of platforms with one familiar Windows OS is far from a problem (unless you're Apple).