It’s almost diabolically ingenious how Microsoft introduces features that drive you up the wall. What really gets you is how they think they know how you want to use your computer better than you do. Or why else would they force Live Messenger to start up each time you check your Hotmail account.
Well, if you don’t want to get rid of Messenger altogether and you’re not checking your email in Firefox, you need to disable the Live Messenger add-on in Internet Explorer.
Go to Tools > Manage Add-ons and select “Run without permission” in the Show dropdown.
“Run without permission”… Don’t ya just love that?
In the list of add-ons, find and disable every instance of msgsc.14.0.8089.0726.dll. If the file name column isn’t showing up, right-click on the fields on top and select Columns > File. Restart IE, and you should be able to check your email in peace.
You will still keep getting an annoying tooltip on the status bar when you sign in, but at least that will go away on its own.