Hi. I joined because a post was linked on other sites... but found that it did not apply... . So here I am. Thanks for reading. Side note: I am aware that a fresh install of Windows is one thing to try, but in this case really the last thing I want to do. Short version: - My new USB audio interface stops playback after 1 minute+ - Only fix so far is to reboot Windows 7 Home 64 bit - It only runs when connected to a powered USB hub - My old USB audio interface displayed the same problem - I have uninstalled + deleted all USB devices and drivers - 'Re-installed' Windows with the upgrade option (this fixed keyboard, mouse and hub not being recognised) - I have reinstalled a Windows update mentioned in KB2484031 - The USB problems began after I moved house and plugged my devices into different ports. Details: After moving house and plugging my USB devices into different ports, I had to 'reinstall' Windows (Upgrade install so I didn't have to reinstall all my other software) as it would not recognise anything except for an old USB keyboard I had never used on this PC before. Before the upgrade install I tried the steps for deleting all (hidden) USB drivers/devices/ports (lots of crap accumulated over the years) but that did not change anything(aside from Windows reinstalling stuff) - hence the upgrade install. My USB keyboard and mouse (plugged in directly) as well as USB MIDI keyboard (via powered USB Hub) now work without issues. However my new USB audio interface stops working after a few minutes. Level meters on screen show sound playing, but no output. I can stop and restart playback - same problem. If I unplug the device and plug it back in, Windows does not recognise it - before that it is still listed correctly in the device manager with no errors showing. It works again when Windows is restarted. If I plug the device into a port on the PC, device not recognised - so it only works intermittently on the hub. My old USB audio interface displayed the same problem (and I wanted some new functions) which is why I got the new USB audio interface. The error occurs both with the Windows USB audio driver and the manufacturer's driver. The only thing I could find was Microsoft's KB2484031 As I don't have a restore point, I uninstalled the update and let Windows Update do the update again (it downloaded the newer 2014 version) but the issue remains.