Can't delete this line

[sestokes]

I can't find the answer to this in my help files. Using the __ key I made a line all the way across the page and hit enter. Now apparently I have a border line, but I can't get rid of it. Help says to edit with Format, but no Format tab shows up anywhere. I'm doing something wrong.

Also, no one can open any document I send no matter how I save it. I purchased a non-commercial version of Word last year, thinking it would be all I'd need. Right now I'm looking for work, so not being able to post my resume in this format is a big issue.

Any help anyone could give would be much appreciated!!