How to download windows 7 with with out being able to get laptop to reboot right

[mikei]

i had to replace harddrive i went form 320gb to 400 gb had a friend downd load a copy of windows7 then i order windows 7 from gateway did what ins. said look like it done good download then it came up an said it had a error and can get it to reboot how can i fix this need help

 

[Ironsounds]

Hello... Did you have a failed install of Windows 7 (version ? )... What media is your Windows 7 (version ? ) install on?