Hi Gerry. Since you’re not enrolled in the Insider Program, you can manage this by going to Settings > Windows Update > Advanced options, then turning off the toggle for “Get the latest updates as soon as they’re available.” This will stop preview (non-security) updates from being offered automatically.
If you’d like more control, you can also use the Group Policy Editor: navigate to Computer Configuration > Administrative Templates > Windows Components > Windows Update > Manage end user experience, and enable “Do not include drivers with Windows Updates” and “Select when Preview Builds and Feature Updates are received.” Setting the update channel to Current Branch for Business will ensure you only receive fully released updates.
I hope it will be usefull.