"Why visual studio 2005 does not work on windows 7?I tried to to install sp1, but the package can not be installed with the following error message: "The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade patch may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade patch." Tried also to Install SQL Server 2005 on windows 7, but keep getting error message: "This program has known compatibility issue." Anyone has some ideas or fixes? Thanks in advance.