Set your default audio playback device to HTC-VIVE-0.
Make sure you are running Steam as an administrator.
Controller not connected
Make sure the controller is charged and on. Turn on the controller by pressing the system button (lowest button on the controller).
Charge controllers by plugging them into an outlet with the included micro-USB cord and power adapter. While plugged in, orange indicates charging. While plugged in, the LED color when fully charged is different depending on if the controller is on:
Green = fully charged and on
White = fully charged and off
If the light is solid blue, it is not successfully connecting. Re-pair your controllers by going to SteamVR > Devices > Pair Controller
If the light is solid red and your controller is not responsive, you will need to reset your controller.
Hold down the trigger, menu button, trackpad button, and grip buttons on the controller (everything except the system button).
While holding the buttons, plug your controller into your computer with a micro USB cord.
Wait for five seconds and release the buttons. Ignore the new storage device that appears and unplug the micro USB cord to reset.
Your controller should function normally now.
Controller Trackpad Issues
If your controller’s trackpad is twitchy and/or oversensitive, it needs to be calibrated.
Make sure you have the latest Controller firmware. You can check by going to SteamVR > Devices > Update Firmware.
Turn off the controller (Hold down the System button).
While holding the Trigger and the Grip button, press the system button.
The controller should turn on, and make a different noise than the standard power on noise.