Many OEMs stopped producing Windows 8.1 drivers after 2016. If you see only Windows 7 or Windows 10 drivers, you can often use the Windows 7 driver for 8.1—they share the same kernel architecture (NT 6.2 vs 6.3). Right-click the Windows 7 installer, go to Properties > Compatibility, and set to Windows 7.
Users of Windows 8.1 may encounter various issues related to the PCI SCC driver, including: pci simple communications controller driver windows 8.1
