Intel’s official site or your motherboard manufacturer’s support page.

Solution: The PCI Simple Communications Controller on Windows 7 64-bit is usually the Intel Management Engine Interface (MEI) driver.

Some users have success forcing the Chipset SMBus driver from the Intel Chipset Installation Utility.

Does anyone have a reliable download link or know which Intel driver package includes this?

Here’s a clear, properly formatted forum-style post you can use when requesting or sharing a driver for the on Windows 7 64-bit . Forum / Support Post Title: Need driver for PCI Simple Communications Controller on Windows 7 64-bit

Thanks. Title: [SOLVED] PCI Simple Communications Controller driver for Windows 7 64-bit

Intel Management Engine Driver (11.0.0.1160) for Windows 7/8.1 64-bit