HP Laserjet won't print multiple copies from Windows 7

Problem: Our HP Laserjets stopped printing multiple copies when we switched from Windows XP to Windows 7. The Laserjet 4600's would actually print another error page after the first print.

Solution: go into the printer properties either on the print server (for networked installations) or the local printer properties (for local usb or parallel port installations), choose the "Device Settings" tab, then scroll down to "Job Storage" set this to disabled, then set "Mopier Mode" also to disabled.  Click ok.

Thanks to the HP support forums and user Sjtracey for this!