Hello Team Basis,
You have to decide which Kernel you want (For Window which is your OS platform) at the below navigation:
Installations and Upgrades - S"SL TOOLSET"SL TOOLSET 1.0"Kernel for installation/SWPM"
However, recommended would be as below:
As your OS is NTAMD64 unicode so as of today (6th Jul'15) you have latest Material number corresponding to your requirement would be 51049439_4
Regards,
NK