Acer aspire 5100

It could be a number of things. But one thing you could try, is push Fn-F7 (Function and F7) key. This has been known to toggle the touchpad on/off. Also, Fn-F1 will give you a menu list of function hot keys.

hi,
try tapping the F2 key when you see the acer logo does that work.

awaiting clarification

On an Acer, the Fn key plus F7 will turn the touchpad on and off.
Try that to see if it works.

have k/b and touch pad been disabled in BIOS?

ahh..well..the cable is under the keyboard..not hard to get to..visual inspection will make it obvious if that is the issue..

Almost same problem: the mouse froze.

Found a nice solution at another website: switch off the pc, unplug the power supply cable AND remove battery. Press "on" switch for 20 seconds. Now re-install battery, plug back power supply cable, and switch on. Worked for me (what exactly worked for me I don't know but hey)

Good luck.

I don't know if you mean that your cursor suddenly moves as you are typing? If so, it is likely your touch pad is too sensitive. I have a mouse w/mouse pad but never disabled the touch pad. So i disabled the touch pad and it solved it for me. If you want to be sure it is the touch pad being over sensitive, then type a paragraph but keep your fingers and palms far away from the touch pad. If the problem improves, like it did for me, then the touchpad is too sensitive. You can go into the settings for the touchpad to change the sensitivity setting to make it less senstive and see if that works and it does not then press Fn +F7 keys to disable the touchpad.

please take the laptop to the service center

have you tried pressing Fn and F7 at the same time or a combo of senarios ... the F7 key runs the touch pad.

function and f7 key is its locked mouse pad or
refix keyboard and touchpad conectors