Umm... Where have you installed it then? 'cause it should get driver updates automatically from Windows Update. (even pirated versions do)
I know nothing of pirated versions.
Admittedly in older hardware.
An older P-4 with Realtek chip. Installed Beta, RC, an upgrade over Vista ( which sucked} and a clean install with the upgrade disk.
A Celeron single core with Realtek chip. Installed Beta, RC and retail. (twice).
In addition W7 didn't have the drivers for my network device on either machine.
My point for the OP was not enough info for us as TM pointed out.