Click this link here: Select your operating system HP Pavilion dv2819nr Entertainment Notebook PC
Then try the Vista drivers, picking either 32bit or 64bit depending on which Windows 7 you have running. (32 or 64 bit version of windows that is)
If you dont know which version of windows, right-click 'Computer' on the desktop, go properties and see which it says. (see the attached picture)
If it says '32 Bit Operating System' or '64 Bit Capable' (not '64 bit Operating System
') then you need the 32 bit drivers.