You can find drivers for your dock at this link to the Dell Support Website. Select Browse all products, click Electronics & Accessories, and click PC & Tablet Accessories. Select your Dell docking station model. Once you have selected your dock model, click the Drivers and Downloads link and the drivers available for that dock should be displayed.
Note: The Dell Wireless Dock (D5000) is not Windows 10 compatible.
If your dock model is not listed, the hardware has not been tested and drivers have not been updated for that model. Dell does not recommend an upgrade to Windows 10. To proceed with an upgrade to Windows 10 on an untested dock, Microsoft provides information and support for upgrade through their upgrade website .