Solution (Worked for me on Windows 10!
Steps:
1. Uninstall any driver related to Razer "In Device Manager".
(WHILE RAZER DEVICES ALL PLUGGED!)
2.Unplug all Razer devices.
3.Uninstall Razer Synapse.
4.Restart.
5.Plug All Razer devices, Razer synapse will appear, let it download and install...