Yea but if you plug a keyboard without the problem into the laptop it should go away. Its a keyboard/hardware problem on a whole not at all limited to laptops. There is a lengthy explanation on the internet why some keyboards do it. Something to do with which grid the keys are on in a circuit. Found under Key Ghosting/Blocking I tried this 4568 combo and actually I'm thinking I like it better than using the standard arrow keys. With numlock turned off and the the 5 key on the num pad changed to reverse thrust it works really well. This way you have the home key, insert, del, end and pgup/dwn all right there on the numpad as well, so you can use items with less right hand movement. I wish i had sat down and tried that before i took the 4000 back cause now im thinking about going back to Compusa and getting it again :-) thanks.