Installing SQL SERVER 2008 must use the Role management tool for the wrong solution

When I first installed SqlServer2008 on the server (Win2008), there was an error--must use"Role management Tools"Install or configureMicrosoft. NET Framework 3.5 SP1。 At first thought it was not installed 3.5, later looked at the server has installed the VS2010, and then ruled out this possibility. Google a bit, and then find a solution to the problem. (I've been going to the server to install and deploy a variety of things and then have problems \("▔□▔)/)

1, the problem appears as follows, pop up a prompt box:



2. Follow the prompts to open the role management tool first. “Control Panel","Management Tools","Server Manager, open it in turn. I cut a picture as follows:


3, in the "Service Manager"In the left menu, click"function", then click on the Add feature in the right functional area, in the popup"Add Features Wizardwindow, tick the. NET Framework 3.5.1function", then click on the" Install "button to install it. As follows:


4, after the successful installation, you can install SqlServer2008.