I read how secure “7” is all the time. Here is a trivial DOS/BSOD attack against 64bit-“7” that is delivered by normal HTML via the Safari web browser. Safari runs on 5% of PCs according to NetApplicatons. “7” runs on about a third of all PCs and 3/4 of that is 64bit. That’s 1% of PCs vulnerable to a trivial HTML attack.
I recommend people use GNU/Linux which is not designed to fail.