They do so,despite the desperate activities of Microsoft to change to Windows 8.
When Microsoft do get Windows right,they deserve the financial rewards,conversely,they deserve nothing,when it all goes pear shaped.
Windows 8, is a 'pear-shaped' version of Windows 7,even when the hiccups have been sorted,it will still be a big FAIL.
In less than 3 years,it will be hogging the 'C' drive,like all their other distro's,more so,now that Microsoft only intend regular 'updates',as opposed to an SP.
My 'C' drive,is now swallowed up with 20.6 GB of WINDOWS files,compare W8 now,with what it will be like 3 years hence.
It's partly why we need new OS's every 2-3 years,just a pity,that there's no equally good alternative out there.