Windows Server 2012: turn off auto restart after logging in

By default Windows Server will auto download new update and auto restart after you log in if the update requires to restart the server. This can cause some unwanted problems such as some applications cannot run after restarting, users complains etc.
You can change this default behavior by policies in Local Group Policies. Below are steps:

1. Press Windows Key + R to open the run prompt.
2. Type "gpedit.msc" and press enter.
3. Navigate to Computer Configuration >> Administrative Templates >> Windows Components >> Windows Update.
4. Enable the "Configure Automatic Updates" policy and set it to "2 - Notify for download and notify for install".
5. Enable the "No auto-restart with logged on users for scheduled automatic updates installations" policy.

See the following image for example:

Have a good time!

Happy new year!