It appears HP does not have drivers for Win 7 for your computer. Is there a specific device or something that is not working you need a driver for?
If the Vista drivers are available for some items, you might try those. They may need to be run in compatibility mode, but Vista drivers are normally fairly close.
If you are looking for sound drivers, check that supplier, like Realtek. Possibly Intel for other devices. If you do not know what the devices are, you might check the HP site for you computer and look at the Vista drivers to see if they point to a manufacturer for each device.