Overtime windows becomes cluttered and diminishes in performance. Actions such as adding and removing programs, updates, changes, internet history and cache, as well an increase in stored temp files all lead to performance issues. Windows is a lazy operating system and does not clean itself. Third party software has to be used to clean and improve windows features, programs and operations. Windows leaves many file folders in place even after removing the programs. The Windows registry is another important place that becomes, cluttered, unorganized and full of useless line entries.