Vista - keyboard and touchpad driver cannot be loaded so not working

hello
I have SATELLITE A200-10W ,HOME PREMIUM installed with SP1. I am using it more than one year.All of sudden what happend that my laptop stop responding and then i restarted it.
My touchpad and keyboard stop working but i logon into window user through ONSCREEN KEYBOARD.
Inside device manager i have WARNING icon on keyboard and insdie it is written under DEVICE STATUS that

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

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

my keyboard is working during BIOS and even when i boot throug boatable cd as WINPE operating system,my keyboard is woring ,even typing everything inside that enviroment but not in normal window.

i tiread restore my laptop
LAST GOOD CONFIGURATION
enforce unsigned driver
SAFE MODE (not working even)

downloaded some software like driver detected etc, but NO RESULT.

i don't want to go for WINDOW RECOVERY CD for OS to re-install
i have a lot of settings , i don't want to erase ...

IS THERE ANY SOULUTION FOR IT ?

• • My Warrenty is already finish after one year ****

pls help and reply.........

Unfortunately, you did not include the "partnumber" of your laptop. It should be on the laptop and start with "PSAE"

I could find out more and advise you better with that partnumber.

Edit: It looks like the problem has been solved here:

Toshiba Support Forums: Satellite A200 - keyboard and touchpad ...

After reading that link Jim, it sure sounds like a simple corrupt device driver doesn't it.

or then again guys, i had this problem with my tosh laptop after a bsod, all i did was consult the manual and press the activation keys on the keyboard, i think it was hold the alt and shift keys and press the touchpad key, i think it was f5, i couldnt tell you now because i sold it ages ago, solved the problem though.

MY PART NO IS
PSAECE-002003AR
MODEL NAME: SATELLITE A200-10W


i would like to share my problem in more detail and for information purpose for others....
i download and install "ACTMON PC & INTERNET MONITORIN" software version 5.11
it was mentioned that it is suitalbe for 2000,WINXP ,, though VISTA was not mentioned.
I started to install that software into my laptop,during installation
kaspersky v8
adware 2008
window defender

reports for suspicious activity by that application but as i knew that this software is kind of SPYWARE itself, so no worry even security programs are reporting it bad because program is made like that.... so i installed anyhow.

later i found my system running slowly,i decided to uninstall it and i did...

later i scan my pc by ADAWARE 2008 , i scanned because i knew that my system would contain lefts for that software..and it is happend that it show me some infected files and i removed all of them
when i restart i found my TOUCHPAD AND KEYBOARD NOT WORKING

system restore in normal window mode was not completing well,in last display message that system setting files cannot be restore...

suddenly it comes in my mind that i should try to restore my laptop while boot in SAFE MODE, and i did it
i restored to one of good point created by me 3 days ago...
during restore,,,,, system restarted and i boot window again into SAFE MODE,finally it gives me message that SYSTEM RESTORE DONE SUCCESSFULLY.
i restarted and boot into normal mode,,
my KEYBOARD AND TOUCH PAD start working...

but system become infected again....

ACTMON monitors keyboard strokes and for that it did some change or replacment into my system which in turns put me in suffer...if i delete that driver KEYBOARD GOES and if not SECURITY PROGRAMS shouts for spyware presence..

I will try to contact SPYBOT forums to make my system clean with the help of expert

thank you for reading that much

hope this will help understanding this problem for others....