People administering computers professionally, as part of their job.
I think these definitions only roughly describe the site concept. For example, somebody working as professional system administrator by a non-profit, non-governmental organization still qualifies the site topic, although it doesn't pass the strictly interpreted "business environment" criteria.
But, for example, a non-technical leader of an IT department of a big company still "manages IT systems in a business environment", despite that his focus of interest and the site topic are probably distinct.
But these are rare exceptions. If we see the idea, the vision of the site, the definition is to me okay.
You can find more proper definitions in the site tour, and on this meta site.
In concrete cases, the vote of the 3k+ users decides about the questions, they are following mainly the idealistic description with different levels of strictness.
In your specific case, if I find your question in the review queue, I had voted either to "leave open" or to close as "unclear", but not to close as offtopic.
If the site closes the question, it also means that you are free to reask it anywhere on the SE network. The forbidden cross-site dupes obviously doesn't apply in this case. In your case I would suggest the security SE (http://security.stackexchange.com), but be more clear - what you wrote from your, currently deleted post, is not enough for me for a categoric opinion.