I upgraded the firmware on my router.  First time I have done this since I've owned the router.  After the upgrade was complete everything reset to the router defaults and I had to set up everything all over again on the router and reconnect all of my devices.  I also had to reboot my Verizon Fios Ont box in order to get connected to the internet.  Is there something that I did wrong during the upgrade installation?  I'd like to know if there is a way to avoid these issues that I had the next time I have to upgrade the firmware.  Thank you.