It is absolutely Microsoft's fault. Many of the existing XP computers a big monolithic systems that have been decentralized so Microsoft could sell more licens

It is absolutely Microsoft's fault. Many of the existing XP computers a big monolithic systems that have been decentralized so Microsoft could sell more licenses. Think networks of retail stores using hundreds or thousands of PCs for their point-of-sale. Or government agencies like the DMV with locations in every rural county. They put a PC on every not-quite-a-desk.