A software program installed unintentionally by a user that typically performs tasks not asked for by the installer. 

CyberWire Glossary link: https://thecyberwire.com/glossary/potentially-unwanted-program

Audio reference link: Butler, S., 2022. Potentially Unwanted Programs (PUPS) EXPLAINED [Video]. YouTube. URL https://www.youtube.com/watch?v=5L429Iahbww (accessed 1.6.23).