Hello,
You can set a target Windows 10 version first:
https://www.kapilarya.com/select-the-target-feature-update-version-in-windows-10
Additionally, you can use Group Policy to block automatic updates. This ensures updates are downloaded/installed only when you want them:
- Open GPO snap-in by running gpedit.msc command.
- Go to Computer Configuration -> Administrative Templates -> Windows Components -> Windows Update.
- Double click Configure Automatic Updates policy setting, select Enabled. Then under 'Configure automatic updating' section, choose 2 - Notify for download and notify for install.
- Click Apply, followed by OK.
Multiple reboots will finally disable auto updates.
Reference: https://www.kapilarya.com/avoid-windows-updates-automatic-download-windows-10
Let us know if this helps!
Note: Included links in this reply refers to blog post by a trusted Microsoft MVP.