If you see these names on a download site, run away immediately:

If you need to download a Windows 8.1 ISO file:

If you have already installed a suspicious "Windows 8.1 ISO file download top pre activated," take these steps immediately:

Cybersecurity firms consistently report that over 90% of "cracked" or "pre-activated" operating system ISOs found on torrent sites and file-sharing forums contain additional, unwanted software. This includes: