Xp was originally intended to spy on users.This was exposed a few months after the release XP. I was with the group that discovered that XP was backed door to the NSA. It was also part of the reason for SP1. After you installed SP1,the backdoor was closed and the memory usage was reduced. As time went on, the source code for windows XP and a few other windows was released to the public. So basically, XP was no longer profitable for MS. Then they released Vista, that was a cheap altered version of Win ME and an Apple/Linux look. M$ started to lose user to Apple and linux. Apple lowered their prices and changed their CPU to an Intel. So, M$ used security issues roll out an O/S.3% of the users wanted something different, so M$ listened. They came out win8, then 8.1 and now 10. All of them linux based with a windows flavor. All of them backed doored toNSA and each one designed to stop people from pirating software.