updates fail

OK - so if you look in the Update History, and double-click on a couple of the latest failed updates, what error messages are given?

The error message appears to indicate an incomplete download - which suggests that the data store is corrupted, or that another update is responsible for crashing a string of updates.
I suggest a complete reset of the WU components....

DOWNLOAD, but do not run yet, the two fixits 50123 and 50202 from
How to fix MSI software update registration corruption issues
and
How do I reset Windows Update components?
(ignore the warning that 50123 doesn't apply - it does - and the pre-emptive run of 50202, as you need it twice anyhow)

then run:-
Fixit 50123 - reboot
Fixit 50202 in Normal mode - reboot
Fixit 50202 in Aggressive Mode - reboot.
then try updating again.
please then open the Update History, and post a screenshot of it if there's still failures
please list teh error messages for all failed updates with the KB numbers and codes.
(Running 50202 in Aggressive mode will delete the Update Hisory - but not the listing in Installed Updates)

The Windows Defender one is the one that's causing the problem - it's a Timeout error.

What Anti-Virus software are you running? What Anti-Malware?
Try turning Defender off in Control Panel - then go to Windows Updates, and click on Search for Updates again.
With any luck it won't pick up the WD update this time, and the others will install.

I can't believe that teh problem with is from NOD - unless you've had other AV's on there in the past? If so, which?

Are you using the Wndows Firewall, or one that came with NOD, or something else?

Disable windows defender in your services (search "run", click it, and in it type "services.msc", all without quotes).
Here is an example of how to disable a service:


If you can (and it lets you without having to pay any money) try to reinstall it (or uninstall, then reinstall). Here is the link once more: How do I uninstall or reinstall ESET Smart Security/ESET NOD32 Antivirus? (4.x) - ESET Knowledgebase

Edit: However, there should be tools (in case this does not solve your issue) found online that will completely rid your computer of all remnants of the antivirus software (after which you would reinstall it, clean). If that program is the problem, this should solve it