Okoker Disk Cleaner is an application that delete junk files and temporary files, and free up your hard disk space. It has tools to scan your drive(s) and find all these superfluous files for you. If you haven"t performed a cleaning on your computer for a while, there will probably be a lot of files that can be removed without affecting your work in any way . The operating system and applications create files when they are used, and many of these files are so-called temporary files . These files are frequently not deleted and can therefore take up valuable disk space and slow down the performance of your computer.