Hi Rajith
Yes, I've had this problem from the time I purchased the computer.
However, I tried your final suggestion and, guess what, IT WORKED !!!
I'm so happy. Thanks for your help. Something so simple but if you don't know just what to try then it can be so frustrating.
By the way (and this isn't a complaint) clicking on desktop icons now opens full screen windows, which suits me just fine, but when I hit the "reduced screen" button on one window then ALL windows open in reduced size but ALL are the SAME reduced size. I'll play around a bit more but thanks again. You've made my day.
Wade (7wombat7)