: The 64-bit (x64) version supports much more RAM than the 32-bit version—up to 192 GB compared to just 4 GB.
To install Windows 7 Ultimate 64 Bit from an ISO file: Windows 7 Ultimate 64 Bit Iso
: Some legacy tools like the HeiDoc.net Windows ISO Downloader once provided direct links from Microsoft’s servers, though availability is now highly restricted. : The 64-bit (x64) version supports much more
Are you installing this on or inside a Virtual Machine (VM) ? Windows 7 Ultimate 64 Bit Iso