Vive all plugged in and situated, following the HTC VIVE Installation Guide on the Steam support pages. I ran SteamVR and was greeted by error 108 (Headset not found). Did some basic troubleshooting by relaunching SteamVR, restarting the comp, changing USB ports, trying USB 3.0 ports, rebooting the headset, and still it won't detect it. Interestingly there is a USB 2.0 port on the back of the case that changes the error code to 125 (headset not detected). I did change ports a few more times, hoping it only needed to install more drivers, but that hasn't worked so far. Any ideas?