I will try to answer:
- 1. Have you updated your Windows fully? It can easily take a few
hours. If you still have the problem google 'USBdevice not
recognised', there is lots of help out there. - 2. I don't think the NUC is the problem. Could be your adapter or
monitor. - 3. If your NUC is too noisy send it back. Many (may be all)
D54250WYK's are noisy and the cooling system doesn't live up to ‘Intel standard’. - 4. Boot time: 45 seconds is too long time I think. I have Internet
connection via LAN in 25 seconds (Intel 525 SSD 180 GB/W7 Pro). - 5. Seems like you have done it right.