Windows 7 compressed ISO around 900 MB typically involves "Super Lite" or "Nano" versions of the operating system. Standard Windows 7 ISO files usually range from 2.5 GB to 4 GB
Microsoft's digital signatures on official ISOs ensure authenticity. A modified ISO breaks that chain of trust. You are trusting an anonymous hacker with kernel-level access to your PC. windows 7 compressed iso 900 mb fixed