There are myriad solutions touted, but it can be hard to know what will be effective, and, importantly, what's safe, chemical-free, and cruelty-free too, as you only want to keep these creatures out. The answer is what's tried and true: natural deterrents. These are proven to work - you can trust they possess no health risks, and they keep mice away rather than killing them.
Cinnamon, the star of pillowy cinnamon rolls and anything apple-based, seems like an innocent spice, but it can potentially be lethal. It has a distinct bold flavor that's both hard to explain and to replicate, but there's one ingredient that has nothing to do with taste - lead. Apparently some ground cinnamon products in the U.S. have been found to contain the heavy metal.
There are various small fit-and-finish enhancements too, including a new app to configure fingerprint recognition, if your machine has a fingerprint scanner. The Hypnotix IPTV player has been improved, and there are companion apps for iOS and Android for two of the Mint built-in accessories (although, oddly, not the same two). The Update Manager will now display a "Reboot" button if any of the updates require you to restart your PC.