I use a MCE Remote (Hama 52451) with an external IR receiver which could power up my NUC from standby mode. To upgrade to Windows 10 I upgraded the bios. Everything then worked fine except the power up from standby. I can use the remote in windows (kodi) and can also use it to power my NUC down to standby but after standby mode I cannot turn it back on.
I tried every option in the bios (power usb in s3/s5), Checked and unchecked enabling the CIR and so on but I cannot use it anymore.
I am willing to buy another one and use the internal IR but I am not sure if it really works.
Is someone here who successfull can power on the nuc with the internal IR and a remote ?
Did you install Intel's CIR device driver for Windows 10, from Intel's download center? Traditionally the resume from standby has been a function of such device driver (not BIOS). When that doesn't work, my additional study would be in various BIOS settings relating to S3 like you said (making sure enough power was going to the CIR hardware to allow detection of the wake signal).