When I am browsing my emails on Hotmail other people see that I'm online and send me IMs which appear in the corner of my screen, which bother me sometimes.
How can I appear "offline" to other users?
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Similar to how Gmail and Facebook have an online chat application that gets activated when you sign in, Windows Live Hotmail started their own online chat in 2010. Just like the options available in Windows Live Messenger, you can 'Appear offline' in the online chat window. See the screenshot for the option.