I had same thing early this year i had Dark Core RGB (not SE) had no problem with update , but however since last august i had major upgrade new motherboard, Corsair DDR4 3600Mhz rams (2x of 8GB) and RM 850i etc i did update but firmware still failed to me, Today other pop up "update" so it did same thing STILL failed me i would not find a file for Dark Core, also got new keyboard K55 also Rams altogether what is worried me i would not update for that firmware, ive wasted for 3 hours searching to find where the file i can get that damn firmware to update and STILL nothing, it bloody frustrating and wasting my time to look for and giving up "the firmware update is not available or failed to load for K55 RGB, and also Dark Core as well"