First, your answer is really a comment on another answer and not an answer in itself. That's one reason to delete. However, looking at your answer again, I realize that I should have converted it to a comment on the other answer instead of outright deleting it. I have now done so. Sorry for the confusion.
That said, this is a very old question that isn't even really on topic here. This site is about Ubuntu, so any non-Ubuntu question is off topic. An exception was made at the time for that question since it was asking for a solution to bad advice given in the official Ubuntu documentation:
This question is asking for help reversing changes explained in a procedure documented in an Ask Ubuntu answer and in the Ubuntu community wiki. Ordinarily Windows questions should be closed as off-topic, but in this case, I do not think we should close this as off-topic. However, it might be reasonable to add information about how to reverse the Windows registry edit in that answer to that answer itself, and then make this a duplicate of that question. – Eliah Kagan Dec 25 '12 at 4:57
So, I deleted your answer because i) it seemed off topic since it was a windows thing (but that was wrong of me since it was the question itself that was off topic) and ii) because it is not really answering the question but instead only extending an already existing answer. Such things should be posted as comments and not answers.
Nevertheless, you're quite right, I should have explained my actions to you. My apologies for your abrupt treatment.