Windows 10 update

How do you stop Windows updates?

See: How to Enable or Disable Automatic Updates for Windows Update in Windows 10
Windows Update Automatic Updates - Enable or Disable in Windows 10 - Windows 10 Forums

That's from the extensive tutorial section- worth getting to know. Very practical and useful.

You may find this easier:

Free to download.

Setting your connection (ethernet or Wifi) as metered is possibly the least intrusive.
Again, Winaero's tweaker can help you with ethernet connections.

Note: If you disable Windows updates, then Windows Defender updates will be disabled.
You can set up a scheduled task yourself to perform Defender updates. A little research will show you how.

Or you can use the Windows Update Minitool to perform selective updates at your discretion (If scheduling is absolutely necessary, the PSWindowsUpdate PowerShell module from the PowerShell Gallery may be just the thing).
HTH,
--Ed--