There are many ways to keep your computer safe and one of the effective method is by running high risk applications such as web browsers and email clients in an isolated space so that it is able to automatically sandbox malware preventing permanent changes.
To find out which are the most efficient, we've run some tests to find the lightest antivirus software. As it's something you have running constantly in the background, it makes sense to use security software that doesn't consume too much of your system memory.