Satellite A200 - cannot load the keyboard and touchpad drivers

Hello

I have SATELLITE A200-10W, HOME PREMIUM installed with SP1. I use it more than a year. All of a sudden it happened that my laptop stop responding and then I rebooted.
My touchpad and keyboard stop working, but I connect as a user of the window through KEYBOARD to the SCREEN.
In Device Manager I CAUTION icon on the keyboard and inside, it says under DEVICE STATUS which

Windows cannot load the driver for this hardware device. The driver may be corrupted or missing. (CODE 39). »

i8042prt.sys and kbdclass.sys files are attached as a driver in detail.

My keyboard works during BIOS and even when I boot with the CD bootable operating system WINPE, my keyboard is not working, even typing everything inside this environment, but not in the normal window.

I tired restore my laptop
LAST GOOD CONFIGURATION
Apply unsigned drivers
Safe MODE (does not work yet)

Downloaded some software like driver detected etc, but... NO RESULTS.

I don't want to go for WINDOW RECOVERY CD for OS to re - install
I have a large number of parameters, I don't want to erase...

IS THERE A SOLUTION FOR IT?

My warranty ended already after one year

pls help and answer...

That s a great info. Thanks for the clarification!

Good bye

Tags: Toshiba

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