just installed driver detective and now my screen won't scroll , it jumps up/down and won't scroll smothly. updated driver on keyboard/mouse also//

uninstall driver detective and see if it clears up.

unstalled both programs . reinstall keyboard/mouse from disc with no improvements//

Check your mouse settings in control panel. There are settings for scrolling and a check box for smooth scrolling.

not much joy with control panel/mouse .log into device manager ,showed up yellow ? on video card,ran upgrade ,problem solved , thanks for your help

Glad to see you solved it. Thanks for posting your solution.