In a sense, having a backup of all your files is the ultimate security. Even if stray debris from a failed Russian satellite destroys your computer, you can still restore it from backup. Some companies reserve backup for their mega-suite offering, while others include it in the entry-level suite. Read our reviews carefully, as backup capabilities vary wildly. At the low end, some companies give you nothing you couldn't get for free from IDrive or another online backup service. At the high end, you might get 25GB, 50GB, or even more online storage hosted by the company, along with the separate ability to make local backups. Tuning up your system performance has no direct connection with security unless it serves to counteract the security suite's performance drag. However, tune-up components often include privacy-related features such as clearing traces of browsing history, wiping out temporary files, and deleting lists of recently used documents. For a dedicated system-cleaning app, read our roundup of the best tune-up utilities.