Factory reset may be the answer. And format the jffs when that is done. Don't use saved settings except for certificates as the nvram may be full.Yes, it's the RT-AC68U firmware I used (as always). I don't use any USB drives, so that's not the issue. I rebooted twice now and with two upgrade attempts. Still the same and CPU Core 1 is permanently on 100% - never ever drops under. I can try a third time, but can't see how this is going to help. Can I downgrade?
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