<p>One of our Windows 10 clients wasn&#8217;t able to install downloaded Windows updates from the WSUS server.</p>
<p>No matter if a user or admin logs on to the machine the Windows Update &#8211; Install now button is always grayed out. Although this client is receiving updates from the WSUS server, users should be able to manually install downloaded updates.</p>
<p><img class="alignnone wp-image-3057 size-full" title="Windows Update - Install now" src="https://www.wincert.net/wp-content/uploads/2019/04/wsusgrayedout.png" alt="Windows Update - Install now" width="465" height="516" /></p>
<p>In order to install updates, I had to delete the registry key that was defined through Group Policy.</p>
<p>Open Registry editor and navigate to the following key:</p>
<p><strong>Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Update\AU</strong></p>
<p>Delete the contents of the <strong>AU</strong> key from the right pane.</p>
<p>After a couple of minutes, you should see updates started installing. Once the system is restarted, the <strong>AU</strong> key will be recreated from the <strong>Group Policy</strong>.</p>

Windows Update – Install now button grayed out
