HP won't have chipset drivers
for it for Windows 7 because Nvidia never made any. The best you're going to get is either whatever Windows uses by default or try the last Vista driver
for it (don't let the Windows 7 in the file name throw you, it is still the same last Vista driver they released), NVIDIA DRIVERS 15.49 WHQL
Just do a custom install and do not install the included video driver, or the "Network Management Tools " if in the list.
Assuming you are using the onboard video (6150 SE), that you can use the latest Nvidia driver for, NVIDIA DRIVERS 280.26 WHQL
as Nvidia lists it as being supported.