can someone tell me how to disable the joystick on an E6400 laptop running Win7?
If you mean the pointing stick embedded in the keyboard, do the following:
Start-> Control Panel -> Mouse
Click on the touchpad picture on the first tab, captioned "Dell Touchpad"
Second option down on the left is Button Settings. Click this
Go to the Device Select tab
"Pointing Stick" & "Pointing Stick Buttons", set to disable.