keyboard not working after installing a new windows 7

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Hi,

I have a sony vaio laptop, i've reformatted the laptop and installed a new copy of windows 7 ultimate 32 bit. but after the installation, the keyboard doesnt work anymore, i've tried attaching a usb keyboard but its working... i have all the drivers installed including the HID-keyboard drivers. btw the keyboard is working inside the BIOS.

Any idea?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References www.overclockers.com/forums/showthread.php/696095-keyboard-not-working-after-installing-a-new-windows-7-ultimate

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