Synaptics driver version 17.0.18.8 is a legacy pointing device driver primarily released around August 2017. It was designed to support touchpads on older Windows-based notebooks, specifically targeted at Windows 10 Creators Update and earlier operating systems. Microsoft Update Catalog Performance and Compatibility Operating Systems
To restore middle-button scrolling (click+move), go to Buttons → Button 3 → Assign "Drag Lock/Virtual Scrolling." synaptics driver version 17.0.18.8
Additionally, check file properties of SynTP.sys in C:\Windows\System32\drivers\ – its product version must be 17.0.18.8 . Synaptics driver version 17