Well, thats a laptop for you buddy. It normally will happen if you're resting your hands on the sides of the computer but if the computer does this without even touching it, its probably a weak or loose connection. The easiest way to fix this is to take apart the laptop, find the touchpad, dust it out, and reconnect it. I've heard of the whole sticky button thing but its very rare so I wouldn't put my money on it but it is an easier repair so you could try that first.

You might find that your mousey mouse is jiggly. Try using a different surface, especially if it's reflective and you're using an optical mouse. If it's a ball mouse, clean out the rollers. If you aren't using a mouse and it's one of them touch pads, try looking at the software that came to drive it, or update it.

Go to Start / Settings / Control Panel / Accessibility Options / Keyboard Options. press "Settings" Turn on "Turn sticky keys off if 2 keys are pressed at once". Or turn off "Use shortcut" 3. Clean your keyboard. Cleaning Laptop Keyboard http://www.computing.net/howto/simple/keyboard/ or maybe this: All laptops will exhibit that behavior on "occasion" if the user is heavy handed or rest's their finger on the pointing devices when not actually moving the pointer itself around. Some laptops are very sensitive, some are not. Since your pointer is not moving around the screen on a full time basis, I'd have to say that's probably it. With older Toshiba's and IBM's, just the weight of your finger resting on the pointing stick causes recalibration. The pointer will wander off the screen because it's locating the edges. When that happens, you have to let it do it's thing, wait a few more seconds, then the pointer is back to normal again. Pulling it back while in motion is an exercise in futility. External pointing devices don't rely on touch sensitivity, hence the reason you're not having the issue when using them. Within your mouse properties should be sensitivity settings, set them all to "heavy'. Disable the "tapping' feature as well. But most important, for testing purposes, don't rest your fingers or hands on the laptop itself if you're not typing or moving the pointer around. If it stops doing it, you know were the problem lies. I personally carry my standard mouse in my laptop bag and use only that. I hate the touchpads and sticks both. also sometimes if you are using a USB mouse or wireless mouse, the type of pad or surface you put mouse on can cause it to wander also, they do not like black, shiny, slick surfaces. hope one of these helps