As of November 1, new PCs will only be available with Windows 10. For a few weeks there will be Windows 7 PCs already in the distribution channel, but no more will be manufactured. What if your applications are not 100% Windows 10 compatible, or you just like the look and feel of Windows 7? Microsoft has extended a program to allow for downgrading Windows 10 Pro to Windows 7 Pro. How much could they charge for that? $5?. $10? Not even close. Anticipate a cost of $35-$45. Ouch.