Method 1 – Using Windows Updater

1. First, log in to your Windows Server then search and open Control Panel.

2. Expand the View by dropdown and select Small Icons to enable the view of all the options.

3. Then, click on Windows Update.

4. In Windows Server 2012 R2, automatic updates are disabled, for that, you need to Turn on automatic updates or click on Check for the updates. Once, you do that, Windows will begin looking for available updates.

5. Next, Windows will display all the available updates and click important updates are available.

6. Select, all the important updates from the list and click on Install.

7. Windows will prepare for the installation and instantly starts the installation of selected updates after download,

Method 2 – Using Windows Powershell

1. Log in to Windows Server then search and open Windows Powershell.

2. First, we need to check the available updates, for that windows, PowerShell has a separate module, first install the update module using the following command: Install-Module PSWindowsUpdate

3. Once update module installation is done, check the available update using the following command: Get-WindowsUpdate

4. Now, run the following command to install the updates: Install-WindowsUpdate