You're looking for information on a highly compressed version of Windows 7 Ultimate 64-bit, specifically one that's around 10MB in size.
Technically, no—not as a functional operating system. A standard Windows 7 Ultimate 64-bit ISO typically requires between 3GB and 5.4GB The "KGB Archiver" Era
To understand why a 10MB Windows 7 ISO is a myth, you have to look at the math of data compression. Windows 7 Ultimate 64 Bit Highly Compressed 10mb
Obtain a genuine, uncompressed Windows 7 Ultimate 64-bit ISO image.
: These files are often "Trojan Horses" containing worms, spyware, or adware that install alongside the OS. Instability You're looking for information on a highly compressed
I can walk you through setting up a secure virtual machine or finding a safe compatibility mode. What is Windows 7? | Definition from TechTarget
If you need to run Windows 7 for legacy software compatibility, testing, or retro gaming, avoid suspicious third-party compression sites. Use these legitimate methods instead: Use Virtualization Obtain a genuine, uncompressed Windows 7 Ultimate 64-bit
Many YouTube tutorials and blog posts from the early 2010s claimed that a tool called KGB Archiver could achieve these impossible ratios. While KGB Archiver used an incredibly high-density PAQ6 compression algorithm, it still could not bypass basic mathematics.