DotNet 3.5 on Windows 7 to Install SQL Server 2008

This is a quick post to install or enable .Net 3.5 on windows 7. Last couple of weeks Im seeing more questions on installing SQL Server 2008 in windows 7 and the users are unable to install SQL Server 2008 pre-requisite (.Net 3.5 ). To Install SQL Server 2008, windows installer 4.5 & .Net 3.5 is required. Windows installer 4.5 is installed and enabled by default, .Net 3.5 is included in windows features, so you can directly go there and turn on .Net 3.5, windows 7 will automatically install this. To turn on .Net 3.5 in Windows 7 just follow the steps below