<h2><a name="p-33696-windows-server-2012-r2-windows-81-1" class="anchor" href="#p-33696-windows-server-2012-r2-windows-81-1" aria-label="Heading link"></a>Windows Server 2012 R2 & Windows 8.1</h2>
<p>It turns out that Second Generation Hyper-V doesn’t include the option to boot from physical CD/DVD. Only Generation one Have the option to boot from it.</p>
<p><a href="http://technet.microsoft.com/en-us/library/dn282285.aspx">http://technet.microsoft.com/en-us/library/dn282285.aspx</a></p>
<p>In previous versions of Hyper-V there was only one type of virtual machine. Hyper-V in Windows Server 2012 R2 includes two types of virtual machine generations that can be selected when you create a new virtual machine.</p>
<p>Generation 1 Provides the same virtual hardware to the virtual machine as in previous versions of Hyper-V.</p>
<p>Generation 2 Provides the following new functionality on a virtual machine:</p>
<ul>
<li>
<p>Secure Boot (enabled by default)</p>
</li>
<li>
<p>Boot from a SCSI virtual hard disk</p>
</li>
<li>
<p>Boot from a SCSI <strong>virtual DVD</strong></p>
</li>
<li>
<p>PXE boot by using a standard network adapter</p>
</li>
<li>
<p>UEFI firmware support</p>
</li>
</ul>
<h2><a name="p-33696-windows-server-2012-windows-8-2" class="anchor" href="#p-33696-windows-server-2012-windows-8-2" aria-label="Heading link"></a>Windows Server 2012 & Windows 8</h2>
<p>See <a href="https://serverfault.com/a/565001/74549">This</a> answer</p>
