An exception of type Microsoft.SharePoint.Upgrade.SPUpgradeException was thrown. Additional exception information: Failed to call GetTypes on assembly Microsoft.Office.Server.Search, Version=126.96.36.199, Culture=neutral, PublicKeyToken=71e9bce111e9429c. Could not load file or assembly 'System.Web.DataVisualization, Version=188.8.131.52, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
You will get this error, when you are trying to configure the SharePoint 2010 central admin (SharePoint product configuration wizard). The reason behind the error is, you might not installed the "Chart Control" in your windows 7 machine.
So, download the chart control from http://go.microsoft.com/fwlink/?LinkID=122517 and install it.