Installation begins with a message from the Compatibility Assistant indicating that SQL Server 2008 has known compatibility issues. It says, "... you must apply SQL Server 2008 SP1 or a later service pack before you run SQL Server 2008 on this version of Windows." I have successfully run SQL Server 2008 SP3 to install pre-installation features. Nevertheless, installation of SQL Server 2008 fails with the following message: "Microsoft .NET Framework 3.5 installation has failed. SQL Server 2008 Setup requires .NET Framework 3.5 to be installed."
However, the .NET Framework 3.5 IS installed on the 2K8 R2 server and all OS updates have been applied. The SQL iso file has been downloaded on two separate occasions from the Microsoft Volume Licensing Service Center and has been burned to DVD using two different computers and DVD drives, yet the installation of SQL still fails. This is a brand new installation of WIN2K8 R2 SP1 with no applications yet installed.
Any thoughts on a remedy?
Can you check the setup of the .net? See the link below:
André César Rodrigues
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- Proposed as answer by Sofiya LiMicrosoft contingent staff, Moderator Monday, July 01, 2013 2:55 AM
Yes, the .NET Framework 3.5.1 is listed as installed in the Features section of Server Manager. The problem is that when setup.exe is run on the SQL installation DVD, the installation fails with the following message: "Microsoft .NET Framework 3.5 installation has failed. SQL Server 2008 Setup requires .NET Framework 3.5 to be installed."
Disabling and enabling the .NET Framework according to the above procedure has no effect. Installation continues to fail with the error message indicated above.
Moreover, installation fails with the same error message on other computers where the .NET Framework 3.5.1 has been installed.
This SQL Server 2008 ISO file on the Volume Licensing Download Service Center site has been downloaded using both Download Manager and web browser methods on different computers, and the downloaded ISO files have been burned to disk with different ISO burner applications. In every case, installation has failed. It's reasonable to suspect that the cause is a corrupted ISO image file on the download site. Can someone investigate this possibility further and perhaps upload an image file that is known to be flawless?
If you feel the media could be the cause, try a slipstream installation of SQL 2008 + SP1 as explained on the following post:
Hope this helps.