A standard, official installation image for Windows 8 Pro requires roughly 3.5 GB to 4.5 GB of data.
Operating systems handle your most sensitive data—banking information, personal photos, passwords, and private messages. Using a compromised or heavily modified ISO introduces severe vulnerabilities: Download Windows 8 Pro Iso Highly Compressed 100mb
If you are looking for a 100MB download because your computer has weak hardware or a tiny hard drive, Windows 8 Pro is not the right choice. Instead, consider these lightweight, secure, and completely free operating systems: A standard, official installation image for Windows 8