Netgear r7000(AC1900) keeps dropping connection when i download

This is good info about the clean firmware update. For clarity, though, are you saying to upgrade firmware in this order? - do factory reset - do the upgrade Then, to get back your configuration, is there an issue, AFTER THE UPDATE, to "RESTORE" all config from the backup? Are you saying that we have to MANUALLY reconfigure everything all over again? I sure hope that there's no issue with restore after the update, because in my case, I have about 34 port forwarding items and a bunch of other configurations. Please confirm which is necessary. Thanks. P.S. I haven't updated this R7000/AC1900 since version 1.0.7.6. The reason, is long ago, I did an update and it really screwed things up. The router was just not stable after that. So I downgraded back to 1.0.7.6 and all was well again. But now, I'm noticing a lot of DoS attacks and I'm not wondering too, if that I'm also being hit with the announced Pre-Authentication Buffer Overflow security vulnerability. I'm trying to find info on how to confirm that (what to look for in logs or whatever) but specific info I can't seem to find. The DoS attacks are listed in the logs, at least. But no idea how to detect and confirm the Pre-Authentication Buffer Overflow security vulnerability. I was actually about to go and buy a new routing, suspecting that this router is on its last legs. But now after reading up on the issues and what the updates fix since 1..0.7.6, I'm thinking maybe the router is fine. HOWEVER, what happens is that the entire network comes down, including wireless, both bands as well as Ethernet. I notice that all the lights go out except the 2 or 3 that are connected to Ethernet. I have to reboot the router to get it back. I actually had to also power cycle the "HUB" (from the ISP) in order to force a new external IP. That also stops DoS attacks for a while. The research continues.