Returned RAM & SSD to Amazon for refund.
Purchased Crucial MSATA 250Gb SSD and 2X 4gb Crucial RAM
Installed RAM & SSD and removed wireless card.
Installed Windows 7 and added wireless card and 1Tb 2.5" HDD.
OS worked but very sluggish and unstable even after second clean install
Removed HDD & wireless card
Installed Win8.1 pro and added wireless card and 1Tb 2.5" HDD.
NUC now working well & stable.
I just need to learn to like Windows 8.1 now!
A cautionary note, the data lead for the 2.5" drive has been disconnected/reconnected so many times now the 2.5 HDD was not always detected by the BIOS. I think there may be a dodgy connection/broken wire but its currently working.
Thanks to you all for your advice in this and my other thread.
Well it didn't work well for long!
Just plugged in a USB drive and noticed that the front two USB ports are no longer working. This is a major problem as my wireless mouse and keyboard occupy the two rear ports.
They were definitely working yesterday although a restore made no difference
All ports are enabled in the BIOS.
Unless there is a simple solution I think its time to admit defeat.
Thanks for the reply but I fear the ports are beyond recovery. Even if I set the BIOS to boot from USB first my thumb drive does not even illuminate or get detected.
I have opened a Support Case with Intel & explained the problem. They replied asking what version of BIOS I was using and also asked for my address to send a new NUC.
Does this suggest they are aware of a problem or is it just very good support?