Lenovo Thinkpad T420 Pci Simple Communications Controller Driver
You might get this too. On both my W520 and my W510 before it, running Win 7 Pro 64-bit, I never got a driver to work for the error message, 'Device driver software not successfully installed - PCI Simple Communications Controller'. Happens every boot-up. But Windows says the driver is up-to-date and reports the driver is Intel Management Engine Interface - version 7.0.0.1144 date. The Lenovo SystemUpdate 5 and the Intel Driver Update Utility never resolved the error. So one might think it's hardware, except it happens on multiple machines.
Download Drivers For Lenovo T420
Interesting how this is still very much a current issue when upgrading Lenovo laptops to Windows 10, where no media card reader driver is loaded/installed by Windows. I've just installed Windows XP on a T400. The system update found software and drivers for everything except one thing. 'PCI Simple Communications Controller'. 014 i could not. Oct 23, 2014 - I have a lenovo thinkpad w520 laptop with windows 7,it seems to be. Not successfully installed - PCI Simple Communications Controller'.