To download and install Microsoft SQL Server 2008 R2 with Management Studio, you can fallow these steps:
Step 1: To download the installation file, click the link;”Microsoft SQL Server 2008 R2 RTM – Express with Management Tools”
Step 2: From the link above, you can download SQLEXPRWT file as x64 (64 Bit) or x86 (32 Bit).
Step 3: You can watch following video for installation.