There is a line through the text in one of my paragraphs.
You probably used the strikethrough markup ('-') without closing it off. Possibly you just wanted a dash in your text. Strikethrough text has a line through it and is formatted like this: some -text- (gives some
text). To just have a dash, type this: (gives some -text-).
When I print from Internet Explorer, there is a line through the table of contents.
In Internet Explorer, go to Page Setup. From there, ensure that Print Background Colors and Images is checked.