Is there a way I can upgrade my MSN Messenger at my workplace without administrator privileges?

You could try doing a search using the MSN Search Engine, to which this forum is devoted. I've never used their chat program, and have no idea what the answer to your question is. Probably the same will be true for anyone who might answer this.

First off, this is a forum for MSN the search engine, not MSN Messenger.

Second, the question is why are you using it at your workplace instead of actually...I dunno, working?