Many factory machines run on old Windows XP or 7. These cannot run modern bloated antivirus. USB Disk Security 6.7 is the perfect legacy solution because it doesn't require constant definition updates.
: Designed to be lightweight (approx. 4MB) and compatible with other antivirus software without causing system slowdowns. Versions and Availability usb disk security 6.7 full
Install version 6.7 on an old, cheap laptop. Use this laptop exclusively to scan foreign USB drives before moving files to your main rig. Set the software to "Auto-Clean" infected files. Many factory machines run on old Windows XP or 7