to get here you need to get to regedit, here's how press windows key +R, type regedit, hit enter, then follow these steps
At first, navigate to the following path:
HKEY_LOCAL_MACHINE \SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\AUOptions
Here, just change the Dword value of ‘AUoptions’ to bring your desired setting back.
Now, see the list below minutely to know hexadecimal numeric value details.
1 : Never check for updates
2 : Check for updates but let me choose whether to download and install them
3 : Download updates but let me choose whether to install them
4 : Install updates automatically
From the below image you can get a better idea about where to change the value.
For example, if you change the DWORD(32-bit) value of AUOptions to ‘1’, the default install updates value of Windows 10 will be changed from “Install updates automatically” to “Never check for updates”.
At first, navigate to the following path:
HKEY_LOCAL_MACHINE \SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\AUOptions
Here, just change the Dword value of ‘AUoptions’ to bring your desired setting back.
Now, see the list below minutely to know hexadecimal numeric value details.
1 : Never check for updates
2 : Check for updates but let me choose whether to download and install them
3 : Download updates but let me choose whether to install them
4 : Install updates automatically
From the below image you can get a better idea about where to change the value.

For example, if you change the DWORD(32-bit) value of AUOptions to ‘1’, the default install updates value of Windows 10 will be changed from “Install updates automatically” to “Never check for updates”.