[RFI] Several USB cables - single toroid

[Pete Smith N4ZR]

I have about 8 USB cables in my station, two going directly to my 
computer and 6 to a hub.  I suspect some RFI because periodically- every 
couple of hours - a couple of USB devices - keyboard, mouse, Winkeyer - 
stop working.  Stopping and re-starting N1MM does not cure it - I have 
to restart Windows 10, and then it's OK again for a few hours.  There 
doesn't seem to be any correlation between the band in use and the 
problem - in fact, sometimes when I come back to the station after hours 
away, with N1MM left running, what was working has now stopped, and a 
computer restart is required.

I'm wondering if it is feasible/useful/foolish, with several USB cables 
going to a single physical location (back of computer, front of 
computer, hub) to wind the cables that terminate nearby together on a 
single big 31 core, or do I need one core per cable to be useful ?

-- 
73, Pete N4ZR