Drivers for HP 455 ProBook G3

Just bought the laptop, HP 455 ProBook G3, it came pre-installed with Ubuntu. I just installed Windows 7 X64 Ultimate.
I can’t find drivers that work.
The following are showing in Unknown Devices.
Ethernet Controller
PCI Device
Universal Serial Bus (USB Controller)
Unknown Device
This is where it was bought from;
http://www.ebuyer.com/705955-hp-455-quad-core-laptop-l8b56es
Answer #1
http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=5225006&swLangOid=8&swEnvOid=4059
Is this where you tried to download drivers from?