Notes field displays as continuous line, but only on lap top

Notes field displays as continuous line, but only on lap top

When cutting and pasting text from MS Word documents into the notes field of the CRM (using Explorer at the browser) on my lap top, the text displays as one continuous line running across the page.  Indeed the text runs off the page. However, when I log into the CRM from my PC, using either Explorer or Firefox, there is no problem.  Any clues on how to fix this?