downgrading driver ???

I am using Intel wireless network adapter 3945abg with window driver, driver version is 11.x.x(old driver) . Now I want to "update" it to 10.x.x driver (new driver). I can't not do it.

I go to Device manager, try to push on update driver -> result -> "currently up-to-date driver, it is not allowed to update".

When I try to uninstall old driver and scan for new hardware, old driver is automatically installed.

Is there anyone know how to update driver ? pls show me

Thanks in advance

When you click on update driver, pick Browse my computer for driver software instead of Search automatically. Or you can try using the driver roll back button.

Thanks , I have already tried it, but it did not work

any idea ?

Did you use "have disk" and navigate to the directory with the driver?

I used methods man, but it did not work

So after you go to "Let me pick from a list of device drivers on my computer" then click "have disk" and select the .inf file for your new driver (10.x.x), you select the driver from the box that matches your card, then click next it tells you that your driver is up to date?

yes

I can easily update driver with XP but I can't do the similar thing with Vista

In between screenshot #1 and #2 what steps are you doing?