Pci device driver for windows 7 32-bit

Hello, i bought a notebook hp pavilion g6 core i3 320hdd ang 2gb of ram, first i used windows7 ultimate 64-bit but i encounter a problem with my bluetooth device driver so i replace it with windows 7 pro 32-bit and again drivers problem but this time a pci devices driver cannot found. i tried to troubleshoot it but it did'nt work. pls help me? is it the os or the software that causes the problem... thank you.