While consumers are certainly still buying Windows 8, the latest and greatest operating system from Microsoft is not getting the same amount of love as Windows 7 did. That seems to be the general consensus, but now there’s data straight from the horse’s mouth to back that claim: at 15 months, Windows 8 sold 100 million fewer licenses than Windows 7 did, according to Microsoft’s own sales figures. Microsoft today revealed that Windows 8 has passed the 200 million mark. The two operating systems grew at the same rate for their respective first six months, but then at some point things slowed down for Windows 7′s successor. We can’t say when exactly the slowdown occurred because Microsoft didn’t share any new Windows 8 sales numbers between 100 million (six months) and 200 million (15 months).