Rebuilding an old HP dc5800 to Windows 8.1 64 and a pesky PCI Simple Communications Controller can’t find its driver.  Its hardware id is:

PCI\VEN_8086&DEV_29D4&SUBSYS_281E103C&REV_02

Googlin’ turns up lots of dead links.  It’s the Intel Management Engine Interface, and here is the driver.

Yeah, I know the title of this post overruns the right column.  I figure by having the hardware id be the post title it will be easier for people in need to find, so I’m leaving it.