I think of non-Linux options as a joke. I would not even consider using BTC on a winxx or mac.
Well that's a bit over the line. I would not call it a joke. I do not see a problem with using BTC (spending wallet) on Windows as long as proper security measures are set and the user has experience/knowledge. As Vod said, currently most people are using Windows 7 but a surprisingly high amount is still using XP. Windows 8/8.1 is okay, but Windows 10 is horrible for BTC.
I know that is provocative, but windows is not open source and so I have no idea what it is doing or who has the backdoor keys. I would assume China has access to all win computers as well as all spy agencies. I try to ONLY run open source software that I compile myself. Otherwise I would be operating on hope, trust and hearsay. That is not the bitcoin way. I like to operate on math.