Two trusted packagers have historically provided clean FurMark Portable builds:
Enter —the non-installed, USB-ready version. But unlike many popular portable apps, FurMark Portable exists in a grey area: it is not officially endorsed by Geeks3D (the developer) in the same way as the installer, yet it is widely distributed. furmark portable download
[Internal Link: Best portable hardware tools for PC repair] how it works
This article dissects everything: where to get it, how it works, the security risks (including miner malware), and how to build a truly safe portable version. the security risks (including miner malware)
For a portable version of FurMark that requires no installation, you should download the ZIP archive