How to get rid of print preview restriction?!
 

I am so frustrated -
I emailed a spreadsheet home from work, so that I could work on it over the
weekend. Ever since, I keep getting this IRM window popping up (wanting me
to sign up for the free trial of IRM), and my print preview is restricted, na
matter what spreadsheet I work on. Even upon opening Excel, with the blank
spreadsheet, print preview is restricted.

How can I get my print preview to be NOT restricted again?