Firstly, please try to at least write clear posts. It's
very hard to follow what you're saying when you put periods in the middle of sentences and not at the end of others and never use any sort of capital letters. This would aid greatly when we try to understand what you're saying.
Secondly, at this point I am confused if you have tried to do this on your work computer or your computer at home. You've mentioned both and yet you never said you had the problem on both computers. You also mentioned a firewall, which could be the problem (for all we know, as we don't know much). Please state explicitly the steps you have taken in safe mode, when you tried normally, when you installed/uninstalled anything. You should also, at this point, post a screenshot of your Add/remove programs (Control Panel, if you're not sure). This would help in diagnosing your problem.
There's also a lovely thing called an edit button under each of your posts, and it is actually against the
forum rules to post several posts in a row in such a short period of time. It is in your best interest to simply use the edit button. It makes it easier to read and glance over the thread.
Just a little additional hint as well, it's not "msn live" it's Windows Live messenger, or if you prefer, WLM for short.