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Acer Extensa 5420 lockout

Keyboard, Touchpad and Audio quit operating. Unable to type or scroll, except with external keyboard or mouse using the usb ports. Reloaded drivers, but systems confirms that system is okay. Reloaded driver for amd64 and says that there is 'error 37'. Any suggestions? Thanks!! I am having this exact same problem with my Acer Extensa 4420 (likely the same build as yours except that mine has a smaller screen.

Purchased on 9/13. Problem started on October 3.

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  • maoaa Oct 17, 2008

    since I started with a external keyboard and mouse, my ACER 4420 is not working any more with its original keyboard and mouse!! Did I touch any function+key? what is the problem

  • DaBrat4E Dec 17, 2008

    im not sure what the problem is my cat walked over my laptop and now the mouse wont work what should i do?

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I am now having a similar problem with mine--no touchpad, keyboard or sound...did the reloading of Vista work for you?

Posted on Jul 20, 2009

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I believe your windows is corrupt.
Try to reload your operating system, i have seen the windows corrupted and cause problem like yours.
If you have usb mouse (external), use the usb mouse and you can check in device manager,
I believe you will see many "!" mark on the drivers.

so solution is reload the operating system.
Good Luck


Posted on Oct 07, 2008

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