View source for Windows update are stuck on downloading or install

=== Reset Windows update components. ===

Resetting Windows Update Components will fix corrupt Windows Update Components and help you to install the Windows Updates. Please follow the below steps to reset the Windows Updates Components manually:

Press Windows Key + X on the keyboard and then select “Command Prompt (Admin)” from the menu.
Stop the BITS, Cryptographic, MSI Installer and the Windows Update Services. To do this, type the following commands at a command prompt. Press the “ENTER” key after you type each command.
<pre>
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
</pre>
Now rename the SoftwareDistribution and Catroot2 folder. You can do this by typing the following commands in the Command Prompt. Press the “ENTER” key after you type each command.
<pre>
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 Catroot2.old
</pre>
Now, let’s restart the BITS, Cryptographic, MSI Installer and the Windows Update Services. Type the following commands in the Command Prompt for this. Press the ENTER key after you type each command.
<pre>
net start wuauserv
net start cryptSvc
net start bits
net start msiserver
</pre>

Type Exit in the Command Prompt to close it.

Now you may try running the Windows Updates and check if the above steps resolve the issue.

For reference: https://support.microsoft.com/en-us/kb/971058

Optionally if update still gets stuck, you can do all steps until start,<br>
you can download the updates from Microsoft Catalog and update manually. Search for relevant KB in the Catalog.
<br><br>
Microsoft Catalog - https://www.catalog.update.microsoft.com/Home.aspx