Why? Because this is an embedded SoC (System on a Chip). Unlike a desktop Core i5, Intel never intended consumers to download drivers for the Z3735F. They provided a reference package to OEMs (Dell, HP, Asus, etc.), and those manufacturers were responsible for customizing and hosting the drivers for their specific tablet models.
To prevent Windows from installing older, buggy drivers: intelr atomtm cpu z3735f 133ghz driver download link
This driver ensures:
We strongly advise using “Driver Booster”, “Driver Easy”, or “Snappy Driver Installer” for the Z3735F. These tools frequently install: intelr atomtm cpu z3735f 133ghz driver download link