Is your USB-m a Garmin or ANT+ branded and sold device, or did you purchase from a 3rd party? We have seen a number of 3rd party devices (from sellers on Amazon mainly) which do not work with our drivers. For these you need to consult with the manufacturer of your stick.
Does your computer have corporate IT management or other security software on it? You may need to consult your IT team.
How is the USB-m showing up? Is it under "Other devices"? Does it have a yellow triangle with exclamation mark?
Garmin / ANT+ USB-m uses
https://www.thisisant.com/resources/ant-usb2-driver-windows/ This .driver should be automatically installing when you plug the USB-m into your computer.
If it is not: Unzip the downloaded file to a folder somewhere you can easily find (such as downloads or desktop folder). You should be able to find your USB-m in "Device Manger", right click, select "Driver" tab, "Update Driver", "Browse my computer for drivers", enter the folder of the unzipped download (ensure "Include subfolders" is checked), "Next". After completing these steps you should see "ANT USB-m" under "libusb-win32 devices".