Here is an informative article regarding the .tj file extension and how it relates to Windows 10.

appears to be a Tajikistani file-sharing or software hosting portal that provides downloads for various versions of Windows 10 , including "Pro" and "LTSC" editions.

Never trust a Windows 10 installation file based on its name alone. Always verify the file's hash against official data to ensure it hasn't been altered. Open on your current Windows machine.

A legitimate Windows 10 ISO file typically ranges between 4.5 GB and 6 GB. Avoid files that are significantly smaller, as they may be corrupted or incomplete.

: Press the designated boot key rapidly during startup (usually F12 , F11 , F8 , or Esc depending on your motherboard brand). Select your USB drive from the boot list.

When running an installer from TopFile.tj, Windows 10 might show:

: A lightweight, open-source utility that formats and creates bootable USB flash drives safely.

Third-party ISOs may be "pre-activated" or modified, which can disable critical Windows 10 security features like Windows Defender or SmartScreen .