just use simplemining OS and be virus free.
Some prefers windows for other reasons, mining OS is a complete mining OS only, you can't do other things on the OS than to mine but with windows you can do lots of things, standalone mining OS is good for those who don't care about other things but mining only
Well ideally mining rigs should only mine.
But real world many want windows 10.
I have lots of rigs most are smos.
But I do mine on a few win 10 builds.