Right-click the Reboot task and select Disable. Click on an icon "C" to select the application.
If the user clicks "Install now," the user will be taken to the Software Update section of System Preferences where the user will have to begin the update
as for the firewall issue: when you install ubuntu, you have to enable the firewall too.
If you update Software Center and then you start having issues, you may need to revert back to an older version or upgrade Ubuntu. Since then, Windows Update keeps telling me to 'Restart your computer to install important updates'.
And check if the program has been successfully uninstalled from your Windows 10 computer. Follow the on-screen prompts to complete the process.
When your PC restarts, you’ll see a number of options.