C6900 reverting to default wifi usernames and passwords

[Duxdad]

Hi,

In the 6 weeks i have owned my C6900 it has suddenly reverted the wifi user/passwords from what I had changed to factory defaults.

I set this up for my son and he gives me all kinds of grief when this happens. 

Any ideas??

Thanks

[plemans]

How many times as it happened? 

The only time I've seen it consistently happen was when the ISP updates the firmware 

[Duxdad]

First of all, thanks for the super prompt reply.

It has happed twice, the ISP is Comcast Xfinity. As I am on vacation away from home I myself have not looked at the screens. Where exactly can I tell him to find the firmware number?

Thanks

David

[plemans]

the firmware isn't user changable. 

And it could the something else causing it. 

You can get a screen snip of the event logs and the cable connections page and post it here to check the connection