I had the Roku Express for just over a month and half, it keep restarting all the time from the day I got it. I read a few articles on this restarting problem for the Roku Express, but it seems none of the users got it fixed. I tried everything in these articles from remove channels to reinstalling them, connecting to different networks, connecting to different TVs, changing out cables, software updates and factory resetting. But my Roku Express still has a multitude of problems:
Constant restarting when watching Netflix, can range from 1-10 mins in a episode of anything. Sometimes restarts on the actual Home screen itself after just restarting.
More recently my audio sometimes goes mute, I have to go back to the Home screen and back to the episode for the sound to come back...
Finally I also have the HDCP error as well from time to time.
I am quite a tech-savvy guy, but I can't think of anything else I can do to remediate these problems, I have a feeling the actual hardware is dying inside.
I can give you the serial number, the model, the software version, device id, type of network connection, uptime, whatever you need even the date and time of each restart, how long or how many times a day I can provide it, pictures.
With retailers like Amazon, you typically have a no-questions-asked kind of return policy. After that, you go with manufacturer support/warranty. I haven't done that with Roku, but here is a page I found: