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I have a MSI Wind U123 Netbook ... all of a sudden lately, the touch-pad refuses to work correctly unless the LAN cable is connected and active. If i unplug the LAN cable, I can't control the mouse pointer and it starts running fast and jumping; it even clicks on its own sometimes.

My only options now are to use a USB mouse or to keep LAN connected and active everywhere I go (which is not available all the time).

I don't know what happened to it. Where should I start? Any help is really appreciated.

PS: It is hardware related, I've tried Windows XP, Windows 7, and a few Linux distributions and it's the same touch-pad problems in all of these OS's.

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Sounds, to me, like defective hardware. How long have you had the netbook? When did it start? What is the warranty? –  Raystafarian Feb 26 '12 at 22:12
    
@Raystafarian I've had it almost 2 years now, the problems started about 4 months or so, and the warranty was for just one year (battery 6 months). –  Ahmed salah Feb 27 '12 at 5:27

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