Yeah I've been thinking about that for a while, Sounds Legit to me. Because of the situation right now Many people Had been pirating windows O.S. Nowadays now people don't buy Licences Key because of this many windows loader to makes your O.S Instantly becoming genuine copy also because of Cloning P.C, Diskless system etc. Just to avoid this malware. Use genuine windows and Update your windows security also put Anti Virus, and  back-up.