That fixed it! I bet it was BlueSoleil, as that was the only thing using serial ports.
The only thing I would add here is that the Renesas USB 3.0 Host Controller drivers are the most recent offered by my vendor and I couldn't find them on the Renesas web site (like your note on the driver page says, it may take a lot of research. Renesas specifically says they don't offer end-user support for USB controllers. My vendor (HP) dates the most recent installer for their USB 3.0 drivers as being from 2011, but I wouldn't be surprised if they haven't kept up.
As a side note, I was having trouble getting my network adapters to use IPv6 even though other computers on my network were doing fine. That TeamViewer VPN adapter must have been the culprit.
I've posted a new report here. If you like, could you offer alerts about old/known-issue drivers? I think I updated or uninstalled all of them, but I'm not sure. It looks like the reports are procedurally generated and compared against your database of drivers; is there a site where I can just submit the reports without taking your time?
