I had to do a factory reset and re-link to my account in order to get the unit working.
I pressed and held the factory reset button on the unit for about 15 or 20 seconds until the until rebooted and re-initialized.
I'm currently waiting for it to reload all of my channels.
Anyone get this resolved? I just bought 2 roku sticks and they both experience the random reboots when plugged in via usb. Any ideas how to fix?