I'm sorry, when I wrote "WEB address", I thought "WWW address" of your web mail.
Just for an explanation:
When you run the "Internet Explorer (no add-ons)", then always all add-ons are disabled - and no matter what is written in the add-ons window.
Note - "add-ons window" is used only when you run the Internet Explorer in the "Normal mode".
So If you write - .... always worked fine with the computer up until a week ago....., then you can try to run "System Restore":
http://windows.microsoft.com/en-US/windows7/What-is-System-Restore
and the date choose, when your computer worked OK.
Did you try to print something from another site? Can you write here the site (WWW address), which has the problem with printing ?
LC