Post #7 here,

What is the Coprocessor and what driver is needed? - TechSpot Forums

is about the best explanation of what it is in this case.

in this case, it was not a coprocessor but a flaw between the Win 7 sub-system and the lack of a specific Nvidia driver. The hardware ID pointed to part of the chipset. I am not sure why this did not show up in other OS's on the same computer (such as Vista and XP) but it seems to be a fairly common problem for Win 7, more specifically a Nvidia problem as opposed to MS or AMD.