If you are using ESET NOD32 there is a chance that you will get this error to windows live messenger.
The solution is to remove the msnmsgr.exe selection from advanced setup like at the picture below.
If this doesn’t solve your problem there is a slight chance that this can be becaues of the .sqm files located as secret files under c:/
Once you remove them you should be able to use your messenger like you were in the old beautiful days 
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Tags: 80072745, MSN, Problem, Solution, sqm, Windows Live Messenger
Thanks man!
I’ve search the internet since april and did not find a solution.
No problem, glad that it helped
UPDATE- The fix: Right click on the Nod32 icon in the systray where the system clock is, click on Advanced setup. Select Protocol Filterting and change the selection to HTTP and POP3 ports. This will solve the problem. (You’ll need to close and reopen Live Messenger after you’ve made the changes before it’ll work)
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Thanks Johnny
Kadir
YES. It works ! I tried everything to make it work and only this works. Even if you disable the NOD32 protection you are not able to connect. You have to uncheck the app as described. Thank you for this very useful post.
No problem, enjoy !
awesome thanks 4 the tip!