While searching for "Windows 8 highly compressed 100MB updated" may lead you to various download links, it is mathematically and technically impossible to shrink a fully functional version of Windows 8 down to 100MB. A standard installation of Windows 8 requires several gigabytes of data to function. The Reality of "Highly Compressed" OS Files
File compression tools like WinRAR, 7-Zip, or ZIP use algorithms (LZMA, DEFLATE) to remove redundancy. A typical Windows 8 install contains:
Unofficial ISOs are a common vector for pre-installed spyware, keyloggers, or backdoors that compromise your data from the moment of installation.
: Ensure you have the latest updates via Windows Update for performance and security.
~780 MB compressed (ZIP) → ~2.2 GB installed. What's removed: Windows Defender, Recovery image, Speech, Fax, most languages, Internet Explorer, Windows Mail. What works: Networking, basic drivers, Registry, Control Panel.
bootice or Rufus (DD mode)