Nighthawk AC1750 - firmware check error

> Model: R6400|AC1750 Smart WiFi Router

   R6400[v1] or R6400v2?  Look for "Model" on the product label.
Firmware version?  Connected to what?  Otherwise it works?

> Getting firmware check error when trying to make sure firmware is up
> to date.

   "trying" is not a useful description of what you did.  "Getting
firmware check error" is not a useful description of what happened when
you did it.  Are there words in this "firmware check error"?  Copy+paste
is your friend.

AC1750v3, firmware: V1.0.4.106_10.0.80, windows, speeds are much slower via wifi compared to my older netgear.