Sony Vaio VGN-BX665P Touchpad woes and solution  

Well like many, sony users, windows 7 is the pits of support from Sony themselves
their basic answer is, if you ran the "hardware verification and there is incompatibilities then don't install windows 7 as we wont make new drivers for it"

situation:

Windows 7 64 Bits, Sony Viao VGN-BX series Laptop
Touchpad hardware failure to work,
identified in Hardware Manager as : ACPI\SNY900D

Now this is ALPS touchpad, after 5 days of scouring the internet for a possible solution I derived synaptec was making drivers for this touchpad, finally found one that works (unlike newers laptops mentioned here elsewere) with this laptop
and figured I would share the information:

solution is easy : DriverPack Touchpad_Mouse 10.03 for Windows Vista (x64) | DriverPacks.net

download this file, unzip it then goto :

DP_Touchpad_Mouse_wnt6-x64_1003\x64\3\Touchpad_Mouse\Synaptics\2 and run setup, reboot when done and your touchpad will work

cheers.

my hardware as reference

Sony Vaio VGN-BX665P
T5500 Dual Core
2GB Ram
Intel 945 Mobile video Card
100GB HDD

thanks for posting this info--ken

FZ21Z asked "Didn't the Vista driver work in compatibility mode? - eSupport - VGN-BX665P "

I did try those in fact, but I am running Win 7 Enterprise (I do testing for hardware) and the vista driver 64 is not of that "ms caliber" if you know what I mean, (ie: as in Home, office, or any version of OS make a difference on the hardware... bleh)

my Solution by-passes the 'Sony "are you running this version of os or not" issue'

The drivers I indicated are made for Windows 7 64 bits (there is a 32 bits as well on that site), and therefore removes the need to run software (not to mention "hardware drivers") in "compatibility mode".