You will still need a valid 25-character product key to activate the software after installation.
These downloads are only legal if you own a genuine Windows 7 Ultimate license key. Without a key, you can install for a 30-day trial, but thereafter it will enter reduced functionality mode (black desktop, no updates).
Internet Archive downloads often time out. Use a download manager like Free Download Manager with segmented downloading (set to 1 segment to avoid IP bans).
The Internet Archive hosts many legitimate, untouched MSDN ISOs. Search for: