I have 4 linked hotmail addresses in my primary hotmail address. I've chosen my preference for the Inbox to open first.
When I select another linked hotmail address within hotmail, the screen clears, then shows the screen before current for the first hotmail address (ie if I've read messages they show as unread, any action taken now shown as not taken), with the yellow header
saying 'when you sign in from another computer Hotmail asks you to refresh your browser for security easons..' .
If I don't act, it goes clear again, and eventually goes to the new hotmail, opening at the new message screen.
This takes ages, and never used to happen. I've checked my preferences and can't see how to help.