So I've had the C4000 for about 3 months now. Speed and connectivity is better than what I had before. 

However, a few issues. 

When I reboot the router, the date and time defaults back to 2019 and 1 hour ahead of the current time. It doesn't matter how I have it set, NTP, PC, Manual. It will always go back to 2019 date and wrong time.

Can't get that to stick. 

Because of that, my Traffic monitor doesn't work right. If I correct the date and time, my traffic monitor won't show the graph properly as its always a day ahead. So If I correct the date and time, and it's Monday, my Time monitor graph will start on a Tuesday. I can't see the anything posted on the graph. I can however see the list of devices and what their traffic usage is.

Antivirus is always stuck on updating. It always says your security database is updaing....

It doesn't matter what I have for DNS. Plus nothings blocked, it worked before and now no dice...

Also, can't login to TP-Cloud, it always errors out saying that it cannot connect to TP-Cloud and when I try to register an it just says Oops and a list to make sure that I can reach the site and iternet is working...

Becuase the router is running the latest firmware, I've reinstalled, changed mutlipe combinations of network settings. Configured, reconfigured the router countless ways and still come across the same issue. I'm hoping that the next firmware update addresses these issues.

But any suggestions or help would be appreciated. It's not terrible to not have these things not work. It's more of an annoyance.