抗焦虑的药物:我怎么安装不上autocad2006

就是在我安装时 首先要安装AutoCAD2006-Simplified Chinese之前必须安装的某些支持部件，我点确定安装，然后在 正在安装.NET Framework Runtime 1.1 Language pack... 时弹出对话框“已终止AutoCAD2006-Simplified Chinese安装。请检查“C:\DOCUME~1\ADMINI~1\ADMINI~1\LOCALS~1\Temp\AutoCAD2006 Setup.log”以获取详细信息。而该文件的内容是：[3/28/2006 12:35:24] === Installation started on WILLAIM by Administrator ===
[3/28/2006 12:35:25] [Info] Windows Installer upgrade is not required
[3/28/2006 12:35:25] System Version = 3.1.4000.2435
[3/28/2006 12:35:25] Installation skipped: MSI Runtime 3.0
[3/28/2006 12:35:25] [Info] .NET Framework Runtime upgrade is not required
[3/28/2006 12:35:25] System Version = 2.0.50727.42
[3/28/2006 12:35:25] Installation skipped: .NET Framework Runtime 1.1
[3/28/2006 12:35:25] Installation started: .NET Framework Runtime 1.1 Language Pack
[3/28/2006 12:35:25] Command = "F:\备份\autocad2006\Bin\AcadFEUI\support\dotnetfx\chs\langpack.exe" /q:a /c:"inst /qb"
[3/28/2006 12:35:27] [Error: 1603] 安装时发生严重错误
[3/28/2006 12:35:27] Installation failed: .NET Framework Runtime 1.1 Language Pack
[3/28/2006 12:35:27] Installation aborted
[3/28/2006 12:37:12] === Installation ended ===
看不明白！！！！！！
我是在网上下载的!还没有安装过,怎么就使用许可到期了呢???只有安装上了才能注册了,还没有安装上怎么注册激活.并且我同学到安装上了,都用了好长时间了,他们也注册了.下载的文件带了注册机和注册码!