That is exactly the FAQ I started from.. What you did (install windows 7 and pick up the windows 10 upgrade) is exactly what I was hoping to do so I will try windows 7 again. I was enabling all the core for the windows 10 install all the cores so maybe that is why it failed.
For windows 7 - I did (at least I think I did) follow to a tea those instructions.
There is another thread on this that points to the install media causing the problem with 'unsigned drivers'
https://lime-technology.com/forum/index.php?topic=41652.15
Maybe I will try to get another windows 7 iso that includes SP1 as listed in that URL above. or try to install the 32 bit version of windows 7 or try a different version of virtio drivers. The trick is that this is our tv server so to take it down means I need to start late when others are sleeping.
If I understand correctly, the lack of VT-d means I cant push the computers graphics to an attached monitor? If that all I would be missing, if so that doesnt matter me to as I only remote in to this box. It is a media server that I run sagetv on, so basically it just functions as a file server
Thanks for the encouragement. I think my new PC idea is mostly driven by not having any down time and by the fact that there are some nice super micro xeon boxes on Ebay under $120. Considering I could spend $50 just adding memory to my existing box it got me thinking.