Installing Windows 7 x64 on Sony Vaio

QUESTION:

 

I have a Sony PCG-71312L (Model: VPCEB15FM) who's CD reader won't read my Windows 7 installation disk! The disk is a Windows 7 Pro x64-bit. I tried installing it through a USB bootable drive but all it does is hangs during installation! It hangs because there is a USB plugged into the ports, but, how else am I supposed to install the win7 without the USB? So I need help.

My alternate option is to not upgrade it to Win7 Pro, and use a clean Win7 Home Edition (btw, the win7 pro disk is cracked/activated, but I uninstall the key and use a legit key i bought to activate it correctly <- and this is probably why the disk won't boot). But I do not possess a clean installation disk of Win7 Home Edition. If anything, I can an ISO of one and burn it into a CD, but I am not sure if I should waste a disk doing so. Please help

 

SOLUTION:

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
https://www.w7forums.com/threads/official-windows-7-sp1-iso-image-downloads.12325/
Download
Burn to DVD
Install using that.
Activate with your key.

Whatever disk(s) you have, put it through the shredder

http://sonylaptopservice.com/