I just installed my new US2X2 on my Windows 10/64 bit laptop. I've noticed a few things: 1. It only runs on USB power if there are no other USB devices plugged in - as soon as I plug in another like a USB hard drive or something, the interface dies. 2. When it is running, the audio output through headphones or speakers is very weak. I have all volume settings on the interface and in Windows maxed out and it only sounds like I am getting 40-50% volume at best. I think I need to run this off of a power supply. Is there anything else I need to check?