If your USB devices are not working properly you will need to restart them. The process is very simple and will solve your problem. If you have this problem and don’t know how to solve it, this tutorial will guide you so you can successfully finish it. These are the required steps you will need to take:
Step 1. Unplug every your device for VR
■ Unplug your headset, the linkbox , controllers anything related with VR connected with your PC.
Step 2. Go to SteamVR
■ SteamVR > Settings > Reset > Remove all SteamVR USB Devices > Yes
Step 3. Exit SteamVR
■ After all these steps you can now reconnect your headset.
■ Use different USB port from the last time
■ Wait all the drivers to install