Hello,
I have a similar problem with my HP Envy 4504.
I'm using Windows 7 service pack 1 and a 64 bits-system.
When I print documents that are larger than one page the printer won't print the whole document.
Now it stopped after 4/7 pages, few moment a go after 3/7 pages. Even a document of 2 pages only prints half.
I get no error. The printer just stops printing at a certain point of a page... I reinstalled the drivers twice and have the same problem on both devices that are connected to the printer (one of them is a hp notebook).
Please Help!!!!