For generic drivers when the manufacturer is no longer active, sites like DriverIdentifier or DriverScape host archives of previously released Z8350 driver packs. Known Compatibility Issues
For a clean installation or update on Windows 10 64-bit, use these official resources: Intel Atom X5 Z8350 Drivers Windows 10 64 Bit
If your device has a specific Hardware ID (found in Device Manager > Properties > Details > Hardware Ids), you can search the Microsoft Update Catalog for exact matches. For generic drivers when the manufacturer is no