RE: Optiplex 5050 + NVMe PCI SSD + trying to clean-install 1703 win10 = "missing driver"
Had installer on one USB stick, and drivers folder on separate USB stick, inserted into 2nd USB port. Installer allowed to browse to folder and select it, but later failed with vague "No new drivers found."
Instead, all I had to do was to place drivers folder onto same USB stick as installer, and when asked to browse for drivers, to remove, re-insert it, and then browse. After that installation goes smoothly and completes in a couple of minutes. 🙂