Hello Donald,
Good day! I'm John Dev a Windows user like you and I'll be happy to assist you today. I know this has been difficult for you, Rest assured, I'm going to do my best to help you.
When was the last time it worked properly? Have you tried restarting your computer? What is the exact make and model of your monitor?
Please check if there is a way to turn it off in your monitor menu
Kind regards,
John DeV
Independent Advisor