System Ninja's clean and simple interface features a vertical row of buttons for accessing its features, each of which displayed its results in the main window in a spreadsheet-style list view, with options appropriate to each. However, we were able to open System Ninja from its Start Menu entry, and it opened normally after that. The troubleshooting guide on the program's site mentioned several possible causes.
We clicked OK but received an error message, and the program failed to launch. When System Ninja's installation wizard finished, it asked if we wanted to open the program. System Ninja is a freeware system cleaner that includes a Junk Scanner and a Startup Manager. While premium system cleaners emphasize deep cleaning, frequent updates, extra features, and even technical support, freeware system cleaners haven't been sitting still. Nearly every PC can get some kind of benefit from regularly cleaning out junk files, emptying system caches, and other preventative maintenance measures.
