Obtaining an official Windows 7 64-bit ISO has become significantly more difficult as Microsoft has ended support and removed most direct download links from its servers ftp.bills.com.au Availability and Official Sources Microsoft Support Status
If the hash matches, your ISO is 100% original. windows 7 64-bit iso file download
If you have a laptop that came with Windows 7 pre-installed, the OEM (Original Equipment Manufacturer) has legal obligations to provide recovery media. Obtaining an official Windows 7 64-bit ISO has
Manufacturer Recovery Media (Safe): If you have a laptop or desktop from a major brand like Dell, HP, or Lenovo, they may still host recovery images on their support sites. Dell, for example, offers an OS Recovery Tool that can generate a Windows 7 ISO if your specific service tag supports it. Dell, for example, offers an OS Recovery Tool