there is a website "microsoft software for students"
The vendor is digital river
you must use only your college e mail address
I think it was 40$ for win 7 pro, including the backup DVD.
You pay for a download, but I don't recommend it. It's
better to wait for the backup disk to arrive.
For win 7 64 bit, it allows a fresh install, the rest are upgrades.
I used the download and it worked as a fresh install, after I copied it
to an ISO disk. It's still working fine. I should have waited for the disk
to arrive. It was actually $27 for win 7 download and $13 more for the
disk. You really should buy the factory backup disk.