Hi, check out this page here regarding your hardware:
HP Printers*-* Installing the Printer Driver Located in Windows Vista*
If you scroll down you will notice it says scanning in 'paint & Window Fax' only works with Ultimate and Business versions of Vista. You might be able to use the photo gallery to scan though?

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AMD X2 BLACK EDITION 3.2GHz SAMURAI COOLER::GA-M51 MB-HEATPIPE CHIPSET COOLER::3GB XMS2 PC6400 RAM::GEFORCE 8800 GTS 320MB 575/900MHz::160GB BARRACUDA RAID 0::SOUNDBLASTER AUDIGY::SAMSUNG WRITEMASTER DVD-RW/PIONEER DVD::HIPER MODULAR 530W PSU::THERMALTAKE ARMOUR Jr CASE::RAZER COPPERHEAD MOUSE::VISTA HOME PREMIUM SP1