I continued to search for help in CH's HELP page and followed the screens for troubleshoot until I got to Hardware troubleshoot page. I then scrolled down to select off the list "monitor troubleshooting." Then had to choose the problem and chose "distorted view." Then I chose "windows issue" and chose document CH000121. I then followed the directions. BUT this didn't solve my problem.
The next day , I went into safe mode again, and then to control panel to appearance to display then clicked Troubleshoot. Then chose "problem multiple monitor" then next choice was "yes" then the next choice was "Yes." The next screen led me back to the original directions listed above except the addition of selecting "Advanced." What I remember here is clicking an arrow list that gave me the choices of the lowest to highest settings and I found the setting that was given me in CH000121 document, which is 800 x 200 with 256 colors. I chose that one and applied it. I then restarted the computer and problem solved, plus I can still use the hp monitor as well.
I hope this helps someone out there. Basically Windows XP had the answer in HELP and CH helped me get there.
