<p>Although Windows Server roles and features can be automatically installed from the Server Manager, some of those features require source files. For instance, when I&#8217;ve tried to install .Net Framework via the Windows Features Control Panel I have received the error message:</p>
<p><strong>The following feature couldn&#8217;t be installed:</strong><br />
<strong>.Net Framework 3.5 (includes .NET 2.0 and 3.0)</strong></p>
<p>A similar error message appeared when I have tried to install .Net Framework 3.5 using the Server Manager:<br />
<strong>The request to add or remove features on the specified server failed.</strong></p>
<p><img class="alignnone wp-image-2920 size-full" title=".NET Framework 3.5" src="https://www.wincert.net/wp-content/uploads/2019/01/net-framework-6.png" alt=".NET Framework 3.5" width="765" height="374" /></p>
<p>To fix this problem, we&#8217;ll have to provide source files for the .NET Framework installation. So, open File Explorer and double click the Windows Server ISO image to map the image in Explorer.</p>
<p><img class="alignnone wp-image-2921 size-full" title=".NET Framework 3.5" src="https://www.wincert.net/wp-content/uploads/2019/01/net-framework-2.png" alt=".NET Framework 3.5" width="504" height="85" /></p>
<p>Run the .NET Framework installation again and in the Confirmation screen click on the &#8220;<strong>Specify an alternate source path</strong>&#8221; link.</p>
<p>Now, browse the mapped ISO image and navigate to <strong>X:\Sources\SxS</strong> where <strong>X:</strong> represents the drive letter that was used to map the ISO image. Please note, if you select X:\Sources folder it will not work, you have to choose the SxS folder.</p>
<p>After the source files folder has been selected, you should be able to install .NET Framework 3.5 along with .NET 2.0 and 3.0 without any issues.</p>
<p>Comments are welcome!</p>

.NET Framework 3.5 couldn’t be installed
