I can not get the e-mail to work.  The screen is wizy wig, The inbox messages will not open nor can I get to any of sent, nor folders.

I went to a friends and used a PC to get to the OUtlook e-mail and was able to find the "return mail box to Hotmail" but it only worked on the PC.  I still have no access on the MAC.  How do I get it to revert?
HELP