When I upgraded to Windows 10, all of sudden my HP P2015n LaserJet Printer was not working. In fact it was not even being detected. Worse it was not even shown in the printer list. I tried installing different HP Printers (other than 2015)but they did not work, at least in first or second try.
Now I turned off my printer and turn it on and it automatically printed test pages “Windows Printer Test Page” without me even opening any application. It says your HP Laserjet 1320 PCL 5 is installed correctly. While my printer is not HP 1320 at least it works!
In the the driver list it says “Universal Printer Drivers PCL 6”. It actually even says P2015 in the driver list.
I did download some drivers which I don’t know the site from, at least it is fixed now.