Once you have the official ISO (approx 3.0 GB), compress it using in .7z format with these settings:
If you need a smaller Windows 7 ISO for testing or virtualization and you own a license: highly compressed windows 7 iso file
A highly compressed ISO is a modified version of the original operating system. Developers use advanced compression algorithms to shrink the file size from several gigabytes down to as little as 10MB to 500MB. Fits on tiny flash drives. Fast downloads: Ideal for capped data plans. Once you have the official ISO (approx 3
Warning: Distributing or downloading Windows ISOs without a valid license may violate Microsoft’s terms and copyright law. This guide is informational only. highly compressed windows 7 iso file
A standard, untouched Windows 7 ISO file size is approximately: