Title: Tempting size, but be VERY careful with "Highly Compressed" Windows 11 ISOs

1. Pre-installed Malware (Redline Stealer, Cryptominers)

Security researchers frequently analyze "custom Windows ISOs." Over 90% of them contain hidden malware embedded directly into the install.wim (the main system image). Common payloads include:

Q: What is the smallest possible functional Windows 11 install? A: Using tools like Tiny11 (a third-party modified version) can reduce the installed size to ~4GB of disk usage. However, Tiny11 removes Windows Defender, Edge, and many system components. While less dangerous than random pirate ISOs, it is still unsupported and can break with official updates. We do not recommend it for daily use.

ISO File Details

Searching for a "highly compressed" Windows 11 ISO (e.g., 100MB or 500MB) is not recommended

  1. Download the official Microsoft ISO.
  2. Mount it (double-click it).
  3. Copy the contents to a folder.
  4. Use NTLite to remove the editions you don't want (e.g., keep only Windows 11 Pro).
  5. Rebuild a custom ISO that is only ~4GB instead of 5.4GB.

Downloading a highly compressed Windows 11 ISO file can save you time and bandwidth. However, be cautious when downloading from third-party sources, and always verify the integrity of the ISO file. By following this guide, you can successfully download and install Windows 11 using a highly compressed ISO file.