So many things wrong here. This is not Sony's fault.
Assuming you have a valid, legal, legitimate license for Windows, you can download the official install ISO here.http://www.w7forums.com/threads/official-windows-7-sp1-iso-image-downloads.12325/
Burn to DVD
Install using that.
Activate with your key.
Whatever disk(s) you have, put it through the shredder.