Im installing a new router firmware upgrade is hung
What does that mean?
What are you doing and where does it go wrong?
What do the LEDs on the R6260 look like?
By the way, it may not matter, but you have posted your message in the section of this community given over to Nighthawk WiFi Routers. (This is easily done, given Netgear's impenetrable community structure.)
If you need more help, you might get better and quicker replies, and find other answers, over in the appropriate section for your device:
General WiFi Routers (Non-Nighthawk) - NETGEAR Communities
No need to repost there, unless you want to – that will just clutter up the place with duplicated messages – but you might find advice related to your hardware.
I have asked the Netgear moderator to move your message.
Just another user.My network DM200 -> R7800 -> GS316 -> PL1000 -> Orbi RBR40 -> Orbi RBS50Y -> RBS40V