I have a HP Officejet G85 printer that works fine when hardwired to my Dell laptop running Windows 7 Home Premium. However, If I disconnect my USB connection and try to wireless print through my network the printer driver for this HP Officejet G85 printer is missing.

Windows Update tries to find it first but it can't. Where does this driver reside for wireless printing. It must be in Windows 7 somewhere because it prints fine when hardwired.