Ultra-compressed Windows builds achieve their small download footprint through two primary methods: Component Removal (Lite Builds):
Here's a comparison of what's possible and what isn't. Windows 10 32 Bit Highly Compressed 100mb
Most lightweight versions strip out essential security components like and disable Windows Update . This is a massive risk, as new security vulnerabilities are discovered in Windows every day. Without regular security updates, your computer is left exposed to all known and future exploits. Microsoft explicitly advises against using any unofficial ISOs, stating it "is not advised" as you don't know "what code has been injected in the ISOs which might be harmful to you as an end user". Without regular security updates, your computer is left
Designed specifically for older systems; runs incredibly fast on legacy processors. The entire servicing stack and Windows Update framework
The entire servicing stack and Windows Update framework must be deleted to save space. Without Windows Update, your system can never receive security patches, bug fixes, or stability updates. This leaves your computer permanently vulnerable to exploits. 3. No Security Features (Windows Defender)