Win 7 install problem

After being overjoyed that i finished buildig my PC I plugged in my USB stick to boot windows. However it keeps asking for windows 7 drivers and apparently i dont have any. Can someone please help. 

I'm assuming it's talking about the HDD drivers. I occasionally get this when I format using my USB drive. For some reason using the original disc the OS came on fixes the problem. 

Maybe this will give you some direction. That's all I got for ya.

thanks

I think the file is corrupted because i downloaded it of a non official website but i m too scared to download anything else incase i get a virus. 

Do you have multiple Hard drives/ssds attatched at the same time? If so, unplug all but the one you want to install on. 

No i only have 1 HDD and no SSD's