Microsoft has finally stopped me from using MSN 7.5!

Due to work reasons, I need to use MSN. That group in Shanghai followed the trend and said they need to use MSN in Shanghai, which forced me to start using MSN as well. To be honest, I've never had a good impression of MSN. I only log in when I need to transfer small Office files, and I go offline immediately after sending them. Perhaps this is why I can't seem to advance. I originally downloaded and used MSN 8, but it ran so slowly that I uninstalled it and decided to stick with the classic version, MSN 7.5. This morning, I needed to send an Office file, and when I logged in, it asked me to upgrade. I chose not to upgrade, damn it, and then it sent me back to the login screen. It looks like I have no choice but to use MSN 8! Feeling quite annoyed... Tomorrow, I'll try Miranda IM or other third-party IM software. If anyone has used these, please give me an introduction!