vs_setup.msi can not be opened

[Q] When trying to uninstall VS2005 from "Programs and Features",
message "vs_setup.msi can not be opened" popped out.

[try]

• Copy vs_setup.msi from DVD
• Read http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=778624&SiteID=1
  
• http://social.msdn.microsoft.com/forums/en-US/vssetup/thread/60f71a54-506e-4c70-be98-e993ce6d1ddf/
  
  "
  (1) Rename the Visual Studio directories to something else (e.g. add xxx suffix to the folder name)
  (2) rename the following Register entry using REGEDIT (use with care!)
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0 (ie. change \8.0 to \8.0xxx)
  (3) Download the Windows Install Clean Up utility at: http://support.microsoft.com/default.aspx/kb/290301
  Use this software to 'clean up' anything with Visual Studio in the name.
  (4) Reinstall the Visual Studio software
  
  "