Updating bios bin
The SOL "driver" is not really a driver but rather a placeholder INF file which assigns a correct device name at Device Manager and prevents the latter from showing the yellow exclamation mark of "No driver was found for this device".
The mandatory regions are the Flash Descriptor (FD, controls read/write access between the regions among other things), the Engine (ME, holds the ME firmware which has been configured for a specific system) and the BIOS.
However, since we cannot always find the latest MEI-Only Installer, it is advised to use the "INF for manual installation" in case its version is newer. The SOL "driver" listed above is part of the complete Drivers & Software packages found at section A3.
A newer Drivers & Software package has newer Software but the actual SOL "driver" may still be an older version.
So there are a total of three families of CSE-based firmware: CSME (CSE ME), CSTXE (CSE TXE) and CSSPS (CSE SPS).
This is a collection of everything Intel (CS)ME related. Thus, they can be extremely helpful to those who have major problems with their systems for which their manufacturer refuses to assist due to indifference and/or system age. They are compatible with both Consumer/1.5MB and Corporate/5MB systems.