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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="additions-windows-install-unattended-certs">
<title>Installing Code Signing Certificates</title>
<body>
<p>To avoid popups when performing an unattended installation of the <ph
conkeyref="vbox-conkeyref-phrases/product-name"/> Guest Additions, the code signing certificates used to sign
the drivers needs to be installed in the correct certificate stores on the guest operating system. Failure to do
this will cause a typical Windows installation to display multiple dialogs asking whether you want to install a
particular driver. </p>
<note>
<p>On some legacy Windows versions, such as Windows 2000 and Windows XP, the user intervention popups mentioned
above are always displayed, even after importing the Oracle certificates. </p>
</note>
<p>Installing the code signing certificates on a Windows guest can be done automatically. Use the
<filepath>VBoxCertUtil.exe</filepath> utility from the <filepath>cert</filepath> folder on the Guest Additions
installation CD. </p>
<p>Use the following steps: </p>
<ol>
<li>
<p>
Log in as Administrator on the guest.
</p>
</li>
<li>
<p>
Mount the <ph conkeyref="vbox-conkeyref-phrases/product-name"/> Guest Additions .ISO.
</p>
</li>
<li>
<p>
Open a command line window on the guest and change to
the <filepath>cert</filepath> folder on the
<ph conkeyref="vbox-conkeyref-phrases/product-name"/> Guest Additions CD.
</p>
</li>
<li>
<p>
Run the following command:
</p>
<pre xml:space="preserve">VBoxCertUtil.exe add-trusted-publisher vbox*.cer --root vbox*.cer</pre>
<p>
This command installs the certificates to the
certificate store. When installing the same certificate
more than once, an appropriate error will be displayed.
</p>
</li>
</ol>
<p>To allow for completely unattended guest installations, you can specify a command line parameter to the install
launcher: </p>
<pre xml:space="preserve">VBoxWindowsAdditions.exe /S</pre>
<p>This automatically installs the right files and drivers for the corresponding platform, either 32-bit or 64-bit.</p>
<note>
<p>For Windows Aero to run correctly on a guest, the guest's VRAM size needs to be configured to at least 128 MB.</p>
</note>
<p>For more options regarding unattended guest installations, consult the command line help by using the command:</p>
<pre xml:space="preserve">VBoxWindowsAdditions.exe /?</pre>
</body>
</topic>
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