CAD2014安装错误？

原因：之前版本残留的注册表没有删除干净。

1、打开桌面左下角的开始菜单，点击“运行”，在对话框里输入“regedit”，点击“确定”。
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2、定位到“HKEY-LOCAL-MACHINE”/“SOFTWARE”，鼠标右键点击“R22.0”删除整个项。
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3、打开“Installer”/“Products”文件夹，找到“7c9f8b73bf3”开头的项，将其删除，即可重新安装。
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4、然后就可以正常安装CAD了。
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这种安装失败的错误似乎是因为AutoCAD 2012或2013安装包中自带有这些VC补丁，而你的系统若是之前就已经因为装QQ或装3DS MAX或Adobe Photoshop CS5或6之类的软件安装过了，那就会报这种错误。
清除所有VC+和.NET相关的软件包，
然后再安装AUTOCAD2014软件即可。