Win8.1 error when you install SQL Server 2012 to enable Windows feature NetFx3

Title, as follows:

This error has occurred, I directly click OK, continue to install, the final installation failed.

The error is that the. NET Framework 3.5 is not installed and has to download the. NET Framework 3.5 installation, but it can also be installed in the "Add Features" section of the Control Panel.

The key is that SQL Server installation fails, uninstall SQL Server incomplete, and reinstall the system, the cup! I don't understand what the internet says, what's wrong with installing SQL Server, and then installing NETFX3 from the command line and rebooting the system; does this "OK" need to be a bit? Restart the system and then run the installation?

I was the point "OK" after the last installation failed. The. NET Framework 3.5 is then installed. See the failure, want to die of heart have, difficult not to buy new computer just installed the system, because a SQL Server and reinstall the system?

Not even ssms, I first use the SQL Server installation file selection repair, repair is not yet!

Later, I chose "New SQL Server standalone installation or add functionality to an existing installation", and then there was a feature that added the required functionality to the installation.

Now my SQL Server can be used normally, the other computer on the database into the database;

Win8.1 error when you install SQL Server 2012 to enable Windows feature NetFx3