For your business you need a more robust application that will not slow down your practice management system. You can use the linked article as a knowledge resource. On the other hand this is such an important issue if you are not a geek by nature it is probably best to get advice and support from your local IT expert. For example Henry Schein Tech Centraloffers a complete security and malware protection service customized to dental offices.
…when I say “antivirus” I mean a utility that protects against all kinds of malicious software, not just viruses. Trojans, spyware, rootkits, keyloggers, adware, scareware – a proper antivirus must handle all of these.