Windows 10 updating

If I go on to Zen PC TuneUp it says there is a problem to fix. Click on that and it says Windows hasn't updated for 148 days (when I first got updated to 10, I think), click on Fix It and it goes in to Settings, tries to update and then I get these -
• Cumulative Update for Windows 10 Version 1511 for x64-based Systems (KB3192441) - Error 0x800706d9 + several more
Tried disabling AVG, as you suggested but didn't make any difference. Won't let me turn on Windows firewall, assuming it's not on - can't tell.

Hello Meg,
We are sorry to know that you are unable to update Windows. To assist you better, could you please let us know from where you get this error message? And to check if AVG is causing this issue, we suggest you to disable AVG temporarily along with AVG firewall and check if that fix the issue. Please click on this link for the steps to disable AVG temporarily http://avgclick.me/TempDisableAVG
Thank you.

Computer won't do some  Windows updates -  Error 0x800706d9 message. I understand this is a Windows firewall problem but I can't check if it's on or off. I just get 'use recommended settings' each time

Hello Meg,
Thank you for the information. In this case, we will email you a link to get connected to the advanced support. Please follow the same and they will fix this issue for you.
Thank you.

Hello Meg,
We are sorry to know that you are unable to update Windows. To assist you better, could you please let us know from where you get this error message? And to check if AVG is causing this issue, we suggest you to disable AVG temporarily along with AVG firewall and check if that fix the issue. Please click on this link for the steps to disable AVG temporarily http://avgclick.me/TempDisableAVG
Thank you.