Whilst scrolling down any page I get an overlapping wave effect whilst using the mouse or keyboard. One clue might be that I deleted some old computer programmes and files the previous session though I cannot think of anything that would cause the above fault. Another odd thing was I had to reset my pixels. Any ideas folks.
Thanks , I am trying , with great difficulty at the moment, to check my graphics driver. At present I cannot access any buttons which will update the drivers. I have tried so called "free" driver update web-sites ....I will come back and report my findings again.