Is your Win 10 machine running just fine, and doing everything as well as you expect it to, and you have good antivirus and antispyware protection, outside of Windows own efforts?
Then quit allowing Win 10 updates; you likely do not need them as they “fix” nothing that concerns you.
And yes you can stop Win 10 updates.
No matter how your system connects to the Internet, whether by a cable to a modem or router, or by Wifi somehow, you can set a setting for that specific connection - the specific “network” connection you use - to “metered”, which says to Windows you pay for that connection by some method that charges you by the minute or hour. It does not matter if that is true or not, you can set it that way.
Believing you must pay for your Internet connection time, (once your connection is set to “metered”), and knowing not how long the Win 10 update will take, the Win 10 update process is forced to stop and ask you if it is ok to run the update.
I have found it does not ask until after I have an activated working Internet connection, and once I decline the update, it does not ask again until I have either shut off that connection and then reconnected it, or have shut down the machine and then started it back up, and made an active Internet connection again.
You cannot turn off Windows 10 updates completely or permanently.
None of the so-called "disable updates" mechanisms that abound on the internet are reliable, much less permanent, other than removing internet access. They all turn out to "defer" updates, not "disable" them, or they merely disable automatic installation -- you do the installation manually, but the updates are still forced on you.
Microsoft has stated repeatedly that you cannot avoid Win10 updates. Period. You can only defer them for various lengths of time based on which edition of Win10 and how you manage your machines. On Microsoft's forum site:
https://answers.microsoft.com/en-us/windows/forum/windows_10-update/how-can-i-disable-updates-in-windows-10/40b37a2b-e9f3-4766-9e44-44ab33af488e
we see that using GPO, "feature updates" can be deferred for up to a year, and that appears to be the limit. "Security updates" (a.k.a."quality updates") cannot be deferred as long as "feature updates", about a month.
Microsoft has also stated repeatedly that they will not tolerate Windows machines that are not doing updates being on the internet, and religiously identifies workarounds and hacks and makes them fail. MS has lots of capable engineers whose job is to anticipate and defeat attempts to avoid updates.
The hack of disabling/killing the update service is unreliable because Windows will turn it back on if it sees that it's off. Repeatedly killing it is merely a battle against a stealthy intelligent opponent who has all the advantages.
The hack of setting the network connection to "metered" (to avoid downloading updates) only works with WiFi, not Ethernet. There are random uncertified programs that fiddle with the system networking in undocumented ways to allow Ethernet to be "metered" (e.g. https://www.rizonesoft.com/downloads/windows-10-update-switch/) but they are not guaranteed to work, or to be bug-free, or even malware-free.
If you are a masochist, consider the "Windows Update for Business" settings, which give the most control and longest defer times:
https://docs.microsoft.com/en-us/windows/deployment/update/waas-wufb-group-policy
https://docs.microsoft.com/en-us/windows/deployment/update/waas-configure-wufb#pause-quality-updates
But regardless, you will lose the battle, because if you're connected to the internet, you WILL take the updates eventually.
Period.
That said, I invite anyone who truly believes they have a working method for completely and permanently avoiding Win10 updates, to describe the method, and then wait a year or so, and demonstrate that their so-called "block" method wasn't merely a "defer" method.