The compressed OS might need to be decompressed into memory (RAM) during boot-up. This implies that such a system would require a significant amount of RAM to function efficiently, potentially limiting its use to devices with ample memory.
If you are looking for a lightweight Windows experience for older hardware, consider these safer, official, or reputable options: Tiny10 / Tiny11: windows 10 highly compressed 50mb
The installation completed, and Alex rebooted his computer. The familiar Windows logo appeared, but something was off. The animation was quicker, the graphics more pixelated. But as the desktop loaded, Alex's doubts began to fade. The compressed OS might need to be decompressed
A free, official Google OS designed specifically to make old PCs fast again. Lightweight Linux: Distros like Linux Lite consider these safer