The Patch KB 974417 http://www.microsoft.com/downloads/details.aspx?familyid=491874d4-5eea-4545-9b7d-3861857c862e&displaylang=en might fail to install with an error message "The upgrade patch can not be installed by the windows installer service...

If you migrate a Setup project from Visual Studio 2008 to Visual Studio 2010 and set the property RemovePreviousVersion=True, The upgrade package removes the application folder once it is installed. This issue occurs because the Component GUID's are changed...

You might have seen an issue with the patch KB974417 where after installing patch KB974417( http://support.microsoft.com/kb/974417 ) , it gets re-offered by WU. I found that after installing the patch the files (mscorlib.dll,SOS.dll,mscorwks.dll,mscordacwks...

While Installing .Net Framework 2.0, you may receive the following error "25007.Error occurred while initializing fusion. Setup could not load fusion with LoadLibraryShim(). Error: The handle is invalid." From the verbose log: 07/09/10 12:59:23...