运行SharePoint 2013 Preview Products Preparation Tool出错。

首先你可以从以下位置下载SharePoint 2013 预览版的相关文件。

• Download SharePoint Server 2013 Preview release
• Download the Windows Server 2012 Release Candidate installation bits (SharePoint Server 2013 runs on Windows Server 2012, so you may as well test both at the same time!)
• Download SharePoint Foundation 2013 Preview release
• Download Office Web Apps for SharePoint 2013 Preview
• Download SharePoint Designer 2013 installation files

来自于：http://blogs.technet.com/b/keithmayer/archive/2012/07/17/sharepoint-2013-early-training-amp-resources-for-it-pros-now-available.aspx#.UBYtNUiAVwW

准备好Windows Server 2012 RC的虚拟机，开始运行安装，首先第一件事就是要运行Products Preparation Tool，很悲催的，我在安装Application Server Role， Web Server（IIS）Role始终出错。

如果你也和我一样，请运行

Import-Module Servermanager
Add-WindowsFeature Net-Framework-Features –Source D:\sources\sxs

D盘是安装光盘对应盘符。 

这个问题导致的原因可能是.net framework 3.5无法被Win Server 2012正确安装。