BIOS version 33 is now available for Skylake NUCs on Intel Download Center. According to the release notes this will improve POST time, fix an issue with shutting down using an RC6 remote and fix a few RAID / Storage related issues.
However, if you are using an SSD drive in your M.2 slot you might notice after the update that your drive is gone! After the first shock you’ll probably realize it’s not gone really, but Intel just added an option in the BIOS to switch on or off the M.2 slot. And by default the M.2 slot is disabled (go figure)!
So what you need to do is to enter BIOS, select Advanced -> Devices -> PCI and then enable the M.2 slot and press F10 to save and restart. Your drive should be intact and you can now enjoy the new BIOS version.
I’ve now updated my Skylake NUCs and everything seems to be working ok. Didn’t notice any major differencies though.