Recent research demonstrates that those with low self-control have an increased risk of victimization due to involvement in routine activities that place them in close proximity to motivated offenders and decrease their willingness to utilize appropriate guardianship factors. This relationship is significant in predicting physical forms of victimization, though few studies have considered how this may account for property offenses, particularly forms of cybercrime which may be hidden from victims. This article explores the extent to which personal characteristics and user behaviors affect the probability of malicious software infections, a serious form of cybercrime, using the integrated routine activities and self-control theory of victimization. Using a nationally representative sample of adults in the Netherlands, this analysis found time spent on specific computer activities (e.g., downloading files) as well as low self-control increase indications of malware infection, while protection of wireless networks seems effective in preventing them.