I've just inherited a HP LaserJet P2015n without the installation CD. I downloaded what I thought was the correct driver before understanding the need to disable the "Never search Windows Update for Drivers" before downloading.
To find it:
START>Settings>Control Panel>System>Hardware>Drivers>Windows Update --- Set the option to "Never search Windows Update for Drivers".
I deleted and re-downloaded a number of times and a number of alternatives. None worked. The ptrinter's green light kept flashing and "GET/DevMan...." printed on a sheet about 2 mins later
A suggestion on this website said that the driver had to be uninstalled, not deleted.
I finally found out how to do this.
First, disconnect the printer from the computer.
Double left click "My Computer"
Left click "Folders" on the task bar.
Single right click on "My Computer"
In "System Tools" select "Manage" - shows "Computer Management"
Left click on "Device Manager"
Open "Universal Serial Bus controller" This displayed "HP Ews UPD"
Right click on "HP EWSUPD"
Left click "Uninstall"
Reconnect the printer to the computer. Initially a message comes up saying an unrecognised piece of equipment has been connected to the computer. Wait until the message disappears.
The printer has now been successfully connected inself to the computer and should be operational.
After running off a piece of printing through the printer, the green light on the printer continues to flash.
Switch the printer's power off. After two or three trial (not "Test") prints, and switching off after each print, the print can be achieved without the green light flashing on the printer.
An alternative, so as not to burden the laser, is to open the paper tray after printing. This stops the printer light flashing green.
it worked for me. I hope it works for you.