

With so many boxes ticked, Avast is the obvious choice for anyone who doesn’t want to invest in an annual subscription. The 343MB disk overhead is easy to live with, too. But with an overall performance score of 90% in our tests, Avast is lighter on its feet than other free rivals and – perhaps assisted by its leaner feature set – even beats most commercial options. Not surprisingly, it wasn’t able to match Microsoft’s Windows Defender, and we weren’t overjoyed about having to wait more than 15 minutes for a “quick” system scan to complete.

It felt smooth and slick, even on a low-powered Atom system. The last piece of the puzzle is system responsiveness, and Avast did well here, too. It isn’t a bad idea for less technical users. If you don’t trust Avast’s judgement, the new Hardened Mode feature in this release takes the opposite approach, allowing only known, whitelisted executables to run. With default settings, it all but matched Microsoft Windows Defender in our false-positives test, gaining a 99% rating.

Avast also impressed us with its ability to stay out of the way of legitimate software.
