Been using Windows ever since my first PC without any issue. Of course, I've had to go through a few lessons and learn the hard way, but that was way before Bitcoin's existence.

I tried different Linux distros & I just can't get used to them. Being used to Windows makes an OS switch pretty hard and there's also the advantage of having about any software you need supported for your Windows PC.

The problems appeared when I wanted to start mining. There were a few cgminer versions available as Windows binaries and later they vanished away. My Windows Defender automatically removed the binary files every time.. annoying as hell. Tried moving to Linux to mine using GPU but gave up shortly after..

I believe if you've been experimenting with Windows a lot and know what to avoid and what not to, Windows is fine too. Linux is safer and as far as I know is very hard to be infected. For now... I'll be sticking to windows. Although I keep contemplating about moving to Linux again...