Q: My email stopped working and my password has been rejected so i can't do software updates.

I went to open my email in mail box to find it was empty on July 1st. kept on coming up error due to shaw cable.. i have an ipad and have been able to get emails from mailbox but not my Mac. able to use my tv. with shaw cable in house.. Also not able to update software as my password has been rejected.  tried using software cd to recover password, but would not open and kept asking for a password i did not have.