There are plenty of reports of this issue for some time and no real solution I have found. This happens in FF and IE. It might be linked to the very slow response from Hotmail now it has been 'upgraded' to Outlook. My feeling is the new system is just way off base with complex new stuff when all we need is pure email!
Generally the new Outlook system is so slow I give up. Clicking on email to read them take way longer than before the upgrade and uploading and downloading attachments is painful!
Looks to me that Microsoft would really like to get out of the FREE email game by cheesing off the current customers! I have been a user since the 1st day if was available many years ago so I have had good value for money but maybe GMail is a better option.
NOTE: Original thread's title: "Blank white screen after login"