The question itself by itself is on-topic, that topicality doesn't get negated by an answer. Regardless of the fact that a complete answer requires some coding as well.

There certainly is overlap between Serverfault, SuperUser and Unix&Linux with regards both topics and tags you'll find there, but a big distinction with regards to both target audience (SF aims at professionals) and environment (no home use/hobby kit on SF), which is as much a consideration with regards to topicality.

In that case the well used generic windows, which you already used to tag your question, is preferable to creating a new tag.