Step 1: Get everything you possibly can out of the System Tray by the clock in the lower right hand of the screen. Simple and free way to "clean" or "defrag" your mac. During the normal operation of a Windows system, registry data is constantly being. How to Clean and Defrag Your Computer. Hello Should I use any prorams to clean or defrag my registry. Computer newbies: Correct Order to Run: Chkdsk, Clean, Defrag - Or? - Read computer newbies discussions and get tips and advice on this. I recently got a new Galaxy 5.