Vista Keyboard Problem

i have a sony vaio laptop, it worked fine for 2 months then suddenly it stopped recognizing the built-in keyboard and touchpad.

in bios it works fine and when the cpu is in sleep mode the keyboard works and brings it out of sleep mode.

the hardware diagnostic says it is working and the driver is up 2 date

when the cpu boots up you can turn CAPS on and when vista loads it turns the keyboard off

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