当VS2005卸载不干净时  

那个恶心……当手动删除一部分文件（也许这部分文件中包括了卸载程序）后，再调用win的卸载程序或360的软件卸载来卸载VS2005，答案是……没办法卸载干净的。想想也是必然的，没了对应的卸载程序当然会卸载不了对应那部分信息，然而再次安装时安装程序首先检测注册表中有没有对应的安装信息，假如检测到有，那你挂了，安装程序自动屏蔽掉已经有注册信息的一部分，只安装被正常卸载的那部分，其实没有被正常卸载的那一部分也不存在了，只不过没有走win的流程，直接手动删除掉了。缺少对应组件的安装程序当然不能成功安装了，就算是修复，也会修复失败。

    在Google上搜索了一番，还好，找到一位国外兄弟跟我遇到相同的情况，其实遇到这种情况的大有人在，但在国内网站能搜到的，大部分是只提问题不提答案的……再一次恶心……国外兄弟的博客当然全是英文了，不过幸好，凭借阅读帮助文档的蹩脚英语，终于搞掂，重新安装上VS2005。
    下面把解决方案贴上： OK, I just ended up having to burn one of my MSDN incidents :( because I could not get Visual Studio 2005 to install correctly, so I figured I'd blog the solution so someone else could benefit from it.   The Error The error message I got simply said that Document Explorer 2005 failed to install.  Tracing the event log I got the following:   Product: Microsoft Document Explorer 2005 -- The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2908. The arguments are: {FAA7C2AC-4205-4228-BEB6-6E647CCA9FD2}, ,   followed by:

Product: Microsoft Document Explorer 2005 -- Error 1935.An error occurred during the installation of assembly 'Microsoft.MSXML,Version="8.0.0.0",PublicKeyToken="b03f5f7f11d50a3a",Culture="neutral",FileVersion="8.0.50727.42",ProcessorArchitecture="MSIL"'. Please refer to Help and Support for more information. HRESULT: 0x80131700. assembly interface: , function: CreateAssemblyNameObject, component: {B1BE189C-054D-4195-9C26-49D28C20DE94}   The Solution The problem was solved by following these steps:

1. Uninstall .NET 2.0.
   1. Click "Start".  The Windows Start Menu pops up.
   2. Click "Control Panel".  The Control Panel windows opens.
   3. Double Click "Add/Remove Programs".  The Add/Remove Programs window opens and after some period of scanning for applications, presents you with a list of installed applications.
   4. Select the ".NET Framework 2.0" application and select to remove it.
2. Delete temp files.
   1. Click "Start".  The Windows Start Menu pops up.
   2. Click "Run".  The Run command window opens.
   3. Enter "%temp%" and click OK.  This will open your Temp folder.
   4. Press Ctrl+A.  This will select all the files in the folder.
   5. Press Shift+Del to delete all files listed that are not locked.  The delete process may abort on error several times stating that a particular file could not be deleted.  Simply unselect that given file by holding down the Ctrl key and clicking the file and continue the deletion.  In my case there were 2 files that could not be deleted in the end.
3. Add registry key.
   1. Click "Start".  The Windows Start Menu pops up.
   2. Click "Run".  The Run command window opens.
   3. Enter "regedit" and click OK.  This will open RegEdit.
   4. Navigate down to HKLM\Software\Policies\Microsoft\Windows\Installer.
   5. Right click in the right hand pane.  A popup menu with one option, "New" appears.
   6. Click "New".  A new popup menu with several options appears.
   7. Click "String Value".
   8. Change the "New Value #1" text to "Logging".
   9. Double click the "Logging" entry.  The value edit window opens.
   10. Change the value of the key to "VoiceWarmup" & click OK.
   11. Close RegEdit.
4. Install the .NET Framework 2.0.
   1. Open Windows Explorer.
   2. Navigate to "D:\wcu\dotNetFramework".
   3. Double click "dotnetfx.exe" to install the framework.
5. Install the Microsoft Document Explorer 2005.
   1. In Windows Explorer, navigate to "D:\wcu\DExplore".
   2. Double click "DExplore.exe" to install the Document Explorer.
6. Install Visual Studio 2005 as per normal from here.

That worked for me... hopefully, it will work for you too! :)

Later
C