Swindon's closest chances was mostly from free kicks with Jackson coming close a few times.
Danny Invincibile also came close for Swindon a few times, but was unable to score. Sam Parkin also had a quiet game and didn't ever look the scoring.
Oxford's goal came after 65 minutes when Louis scored from a close range header to give Oxford to lead.
Swindon came close to scoring a minute later, but Oxford held out for the win to give themselves the chance to go and play Arsenal away in Round 3.
Overall in was a very poor game for Swindon with most players most seeming to care that we were losing.