Virus Software
On Windows Machines, be sure you are running Microsoft Security Essentials or Windows Defender. You can find helpful information at Microsoft.
For Macs, you can load Sophos for free.
Malware Tools
We recommend using Malwarebytes to help protect your device from malicious software. There are versions for both PCs and Macs. There is a free 14 day trial and a discounted student rate.