After vs2008 is downloaded, the installation always fails. Check the log and the prompt is:
[11/22/07,18: 04: 40] Microsoft. NET Framework 2.0a: [2] error: Installation failed for component Microsoft. NET Framework 2.0a. MSI returned error code 1603
[11/22/07,18: 05: 13] wapui: [2] depcheck indicates Microsoft. NET Framework 2.0a is not installed.
[11/22/07,18: 26: 27] Microsoft. NET Framework 2.0a: [2] error: Installation failed for component Microsoft. NET Framework 2.0a. MSI returned error code 1603
[11/22/07,18: 26: 57] wapui: [2] depcheck indicates Microsoft. NET Framework 2.0a is not installed.
[11/22/07,18: 49: 56] Microsoft. NET Framework 2.0a: [2] error: Installation failed for component Microsoft. NET Framework 2.0a. MSI returned error code 1603
[11/22/07,18: 50: 28] wapui: [2] depcheck indicates Microsoft. NET Framework 2.0a is not installed.
After repeated searches on the Internet, it is estimated that SQL 2005 SP2 is installed in your system, resulting in. NET 2.0 SP1 installation failure.
Finally, a. Net Frame cleanup tool is found. After cleaning, restart and install it again.
DOTNET cleanup tool: dotnetfx_cleanup_tool