Hi,
I bought a Lenovo X240 core i7 Windows 10 to run SA44B but could not get it to load USB drivers hence intermittent orange LED, eventually having tried all the suggestions on this forum I bought another laptop, a Dell Latitude e6440 core i5 windows 7 ultimate, and was extremely upset to find I have exactly the same issue.
It works perfectly on a Lenovo Yoga Windows 10 so is not the SA44.
I now have 2 reduntant laptops. Any suggestions gratefully received.
Regards
Marc