Notebook Asus X540S. OS Windows 8.1.
All drivers are ok, but one Intel(R) Celeron(R)/Pentium(R) Serial IO (SIO) GPIO - 33FF Can someone help me to find it? ID is ACPI\VEN_INT&DEV_33FF
Official Asus site supports only windows 10. Without this driver touchpad and cardreader doesn't work.
Your laptop is new and it was designed according to newer operating systems. The drivers available were built according to Windows 10 operating system only.