>Dear Sir,
>
>Is it possible to run WINDOWS XP on 640 x 480 screen resolution?
>
>If yes then how?
>
>Please help

It will depend, at least in part, on the video card. Mine simply won't allow 640x480. I don't think that's an XP problem. The smallest available is 800x600.

Pocket PCs certainly have a 640x480 resolution (Windows CE)

Again it's the hardware.