The best anti-malware prevention is the finger you use to left-click your mouse. The safest key on your keybpard is ESC and is much more powerful than hoping for an Undo feature.
Seiko Instruments
We offer sales, installation, support, and training for Seiko's Smart Label Printer line of thermal printers and consumables. Their 300dpi resolution label printers are as asset for any labeling need from file organization to mailing/shipping to name badges.