1. Windows
2. Utilities & Operating Systems
3. Maintenance & Optimization
4. System Ninja Download

Clean up and remove unwanted files from your system.

System Ninja Screenshots

System Ninja Editor's review

Nearly every PC can get some kind of benefit from regularly cleaning out junk files, emptying system caches, and other preventative maintenance measures. While premium system cleaners emphasize deep cleaning, frequent updates, extra features, and even technical support, freeware system cleaners haven't been sitting still. System Ninja is a freeware system cleaner that includes a Junk Scanner and a Startup Manager.

When System Ninja's installation wizard finished, it asked if we wanted to open the program. We clicked OK but received an error message, and the program failed to launch. The troubleshooting guide on the program's site mentioned several possible causes. However, we were able to open System Ninja from its Start Menu entry, and it opened normally after that.

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