I encountered a HP Officejet 4500 drivers downloading problem from www.hp.ca.

When I search “HP Laserjet 4500 Wireless ” on the model box, it prompt “This is a discontinued model and we don’t provide the drivers any more”.

The alternate way for this kind of issues is Google the drive from HP website forum but be careful not download the “fake” one which includes the virus or redirect to some unhealthy websites.