What operating system (OS) are you currently using?
Fail, because what SM should be asking is what OS are you going to be using?
It's the future that matters, not doomed commercial operating systems.

Linux-based system here.

BTW, I haven't filled out the survey because it's implemented in SM's typical "pushy" fashion.  They need to understand that when people spend their time filling out a survey for a company, they do so out of good will - we owe you nothing.  This means that we should be allowed to skip any questions we don't want to answer.  You're not paying people to do this, so you're not in a position to push people around.  By refusing to move to the next page without filling in every question, you're effectively ordering people around, or like I said, being "pushy".

So anyway, like I said, I missed out the questions I didn't want to answer, but was told by the SM survey that I can't go any further until I answer them.
I'll leave you to guess whether being "pushy" got your survey filled out ;-)