Windows automatic update error. Can't update windows

[ETO]

Hi.

I have Ruckus ZD1200. 

For some time already I have issues with Windows updates. I can't update it on any computer that is connected on WIFI network. If I connect to network switch then I'm able to update windows.

Any suggestion what could I check, I even don't know if it has to do with Ruckus but worth a try.

Thank you.