That would be because there is no single answer to the question. Different people have found different solutions to the same problem, and there is no reason to start another thread on a topic that seems to have been exhausted. You may just find an answer that applies to you if you read the thread you're directed to. It is a known bug - whether it's a mIRC bug or a fault with XP is arguable. Name calling won't get you anywhere either - the people that help out on these forums are volunteers. Nobody claims to have the answer to every single question.

Never compare yourself to others - they're more screwed up than you think.