The safest way to acquire Ultimate Edition is through its official project pages, which provide both direct ISO downloads and official BitTorrent links:
Using the official torrent file provided on SourceForge is often better than a direct download because:
Restart your computer, enter the BIOS/UEFI menu, and select the USB drive to begin the live session or installation. Download Ultimate Edition torrent
Torrent clients automatically check for "corrupt" data pieces during the download, ensuring your ISO file is perfect.
While you can download it via torrent, it is highly recommended to use official sources to ensure you are getting a secure, untampered version of the operating system. The safest way to acquire Ultimate Edition is
It utilizes peer-to-peer sharing, which can be faster than server-side downloads.
This is the primary repository for all Ultimate Edition releases. You can find the latest stable builds and older versions here. It utilizes peer-to-peer sharing, which can be faster
Use a tool like Rufus (Windows) or BalenaEtcher (Cross-platform) to "burn" the ISO onto a USB drive.