The free version of System Mechanic is a good choice for Windows users, but it is lacking in features. This program does not include a defragmenter, registry cleaner, or disk optimization tools. It also doesn't check for leftovers after installation. While most of its features are available in free programs, it is worth paying the extra money to get a pro version. The full version costs $39.95, which is not bad for a free program.

The free version of System Mechanic Professional comes with LiveBoost, which optimizes your Internet configuration. This software also backs up the Windows Registry biweekly. It scans for viruses on a regular basis and downloads updated tune-up definitions. You can run LiveBoost automatically or manually. The free version offers the same features as the paid version. It can optimize your system and detect malware, but only the paid version comes with the premium version.

The paid version of System Mechanic Professional includes additional features. You can use it to clean your PC and speed it up. It includes a PC optimization tool, as well as one for 10 users. The free version also comes with three security tools. The anti-malware protection tool shields your computer from threats that can be downloaded from the internet. It also protects you from 2.1 million malware threats, and actively searches for new ones.