These should be the latest versions and are free for university-owned computers, as well as personal computers. You will have to login with your Unity ID and Password to access the software. Versions are available for Windows and Macintosh computers.
Instructions are also available on the same web page.
It's always a good idea to run virus protection software on a regular basis. A computer virus has infected Macintosh computers around the world. It started in Hong Kong in May 1998 and various strains have spread widely since. It has reached the School of Design. Two tools are available that will help prevent and delete this virus.