This message was posted on behalf of Intel Corporation
EdFred: Thank you very much for sharing that information with our Intel® NUC communities. We are sorry to hear that the NUC is not working properly.
In order to try to fix this problem we can always try a BIOS update to the latest version 0050 using the F7 method:
Even though you mentioned you already tried to re-install the drivers and all of them are up to date, we can still try to manually install the following drivers:
Graphics version 4729:
Any further questions, please let me know.
I ended up wiping the drive including partition deletion and creation. Clean install rather than upgrade, and after manually installing the drivers, I finally resolved the issue.