While many websites and blog posts claim to offer a "highly compressed" version of Windows 7 Ultimate 64-bit as small as , these files are not legitimate operating systems and are widely considered dangerous scams .
If you found a file named Win7_Ult_64_9MB.rar , follow this protocol: Windows 7 Ultimate 64 Bit Highly Compressed -9.28 Mb
If you need a compact, legal, and functional Windows 7 Ultimate environment, here are real options: and functional Windows 7 Ultimate environment
A review of a "Windows 7 Ultimate 64-Bit Highly Compressed" file at roughly 10 MB indicates that the download is . A legitimate Windows 7 Ultimate 64-bit installation file typically requires approximately 3 GB to 5.5 GB of space. Critical Security Warning Windows 7 Ultimate 64 Bit Highly Compressed -9.28 Mb