J3553,
If you can, connect a wire to the laptop for the internet.
Follow the same steps to uninstall the wireless driver, except don't restart the computer.
Go to HP.com and update the driver.
Here is a link to the update.
Windows compatibility shows that the router is compatible with windows 8.
If it is hardware, you can call HP and they can send you out a new wireless card.
Here is a link to a number to call HP.
Let me know how everything goes.