why a kms activated system cant upgrade to wmc it show you cant add this feature .. any method to upgrade wmc any commands??
VL (Volume License) versions of W8/8.1 don't support WMC. AFAIK, no one has overcome this limitation. There are many threads here about WMC requirements, and while I am no expert, I am am pretty sure one needs at least a valid PRO Retail and/or WMC key at some point.