Some recommendations:
- USB issue: I would remove all USB host controllers and root hub drivers from device manager, then restart.
- Video issue: I agree it could be related to the converter.
- Fan noise: You may want to adjust the fan response in BIOS. Updating the BIOS may help too. Otherwise, contact your local Intel® support team for replacement.
- Boot time: Do you know if your Intel® NUC unit came with a thermal pad for the SSD? If not, contact Intel® support to get one. Otherwise, it could be related to the SSD itself.
- Driver installation order appears to be correct.