Do not download from random "driver download" websites. They often contain outdated or infected files. The safest source for legacy homebrew tools is or the PS2 Homebrew Forums (PSX-Place, PS2-Home).
Extract the USBUtil files onto the root of your USB drive. You should have a folder structure similar to: usbutil 20 ps2 download english top
: The software is a "portable" application, meaning it requires no installation—just download and run the .exe . How to Download and Use USBUtil 2.0 Do not download from random "driver download" websites