I handle personal client information. Stuff that shouldn't get lost. Because of this, I have had to be careful not to download or install anything that is in any way uncertain. One data stealing virus on my computer could essentially affect all of my clients. I use PDFs, Microsoft Word and Excel for storing the information, and Firefox for communicating with clients via email.
This is a problem, as I've come to a point that I have to test out several pieces of software that do fall into that uncertain category.
To keep my clients' data completely separate from the software I will be testing, I can set up a second computer.
Worst case scenario the testing computer gets hacked.
If they both connect to the same internet line, what can I do to prevent it from doing anything to any other computer on the network?