: This is the only effective way to create a smaller, bootable Windows installation. Instead of using basic archiving, tools like NTLite or its predecessor, nLite , allow you to surgically remove drivers, language packs, and Windows components you don't need. This creates a "Lite" version that is often significantly smaller.
Once your modifications are complete, use the software to build a new ISO. Choose the compression format instead of the traditional WIM format. ESD uses a much higher compression ratio, safely cutting your installation file size nearly in half while maintaining total system integrity. Best Practices for Installing Windows 7 Safely highly compressed windows 7 iso file
Despite the technical ingenuity, downloading "highly compressed" ISOs from third-party sources carries immense risks: Security Vulnerabilities: : This is the only effective way to