SQL Server 64 Bit Version ?

I want SQL Server 64 Bit Version ?

please use this link
http://www.microsoft.com/en-us/download/details.aspx?id=15291. Read the instructions carefully for 32-bit and 64-bit.
Install "SQLEXPR.EXE" on your PC.

Then install Management Studio from this link: http://www.microsoft.com/en-us/download/details.aspx?id=8961

First try to download and install any download manager like Internet Dowload Manager.