In this post Music_man describes his problem with installing the USB driver for the Ayre Codex.

music_man said:

  not working here! first of all running windows 10 pro 64 bit. had to install driver in windows compatability mode. that is bad to begin with. then i open jriver. everything itry i just keep getting errors and no playback! it says it is tusbasiodriver. i hope someone can help! apparently also this does not upsample at all from the looks of it? all i read were the rave reviews now this. great. i would really appreciate if someone helps out here. i know my way around a windows machine and jriver but i am now stumped. thanks.

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His solution was to get the Ifi purifier out of the path. I wish it would have worked for me; I have no interfaces between the Codex and PC, just a USB cable directly out of PC into the Codex.
 
Sorry I am quoting an old post. I have the same problem on both by laptop and PC, both with W10 Pro 64 bit. The device manager shows the Codex. however when installing the Streamlength driver the installation starts and the sops saying that device needs to be connected. Even though the Codex is connected, otherwise it would not show up in the device manager, would it? Below is a screenshot, I hope that will clarify my issue.
 

 
 
Have checked the USB drivers, those are up to date. Bios is fine I suppose, have reset it to default,  to no avail unfortunately. Have already mailed Ayre a few days ago, no reply yet.  Before i am going to do a total re-installation of Windows, can I please ask for somebody's help? You can also PM me if you prefer, we can post the solution afterwards here. Thank you so much in advance.

I got it working on both my laptop and my audio PC. For the laptop the solution was to do a thorough clean-up of the registry and uninstalling software that could have been audio related, except for Foobar and JPlay. Can you imagine how happy I was after days of trying all kinds of possibilities?
 
On the dedicated computer for audio this did not solve it and I had to do a complete fresh install of Windows 10.  On a positive note : this computer is now very clean, with only the driver for Ayre Codex, Foobar and JPlay on it, no additional software (yet) , maybe will add Fidelizer, but that would be it.
 
The sound is very, very good now from the Codex, so it was worth it, however I hope nobody will get into such troubles as I did with an old driver on a new product giving headaches  

the latest version of windows 10 has it's own codex driver. only wasapi. it sounds better than both wasapi and asio on the streamlength 1.26 imo. it is also less finnicyy with the problem you had. both my codex and qx5 would disconnect all the time. then start disconnecting/power cycling. you have to run that in compatibility mode. it is bs they have that old driver with the qx being 14 grand.

I would not have foobar and jriver on the same machine for the best sound. even if it is not running there are tsr's going on. jriver 23 is much nicer than foobar imo. it has a very fair price too.