Ever since upgrading to Office 2013 a few months ago my emails in Outlook are not formatted correctly. I am running Windows 7 Pro with Office 2013 and using Outlook 2013 with POP email accounts. The messages display fine if I check them on my
laptop that still has Outlook 2010, they also display fine on my iPad and in the webmail client. Some messages have some of the words or letters blocked out and other messages have lots of extra 'lines'. Here are a couple examples:

Here is an email from Dell with lots of extra gray 'lines' in it for some reason:

Any idea why it looks that way?