System Ninja is a program for cleaning your computer of unwanted junk that constantly slows your entire system down. Besides the useful file cleaner, System Ninja also provides a Process Manager, Startup Manager and P3P Registry History cleaning tool. System Ninja features a powerful scanning engine designed to locate junk files on your computer, wherever they are hiding. System Ninja looks at a files creation time, file extension, location and many other factors to determine whether it is needed by your computer.