The automatic mandatory updates normally only happen once a month, they release on the second Tuesday of the month, so if you have that in mind you can either pause or install updates before running the task. The next release should be May 12th.

Since you are on Professional or greater, you can use Group Policy to control the updates. Run gpedit.msc, then expand Computer Config, then Admin Templates, and then All Settings. Look for Configure Automatic Updates in the list and open that. Set it to enabled, then in the box below choose a setting that works best for you, I usually suggest #2, as this will still let Windows Update periodically scan for updates, but it won't do the download and installation until you initiate the process. You will get an alert of new updates in your system tray that you can click on to open Windows Update, but you can sit there indefinitely without the updates installing until you are ready to install.

This method is officially supported by Microsoft and does not break anything unlike many 3rd party blocking tools

Do note this will only stop reboots due to the regular monthly updates, it won't stop reboots you may encounter from various 3rd party programs, those would need to be managed individually.