Abstract: This study will point out the major windows registry security issues in windows-based platforms and explain how the development of an automated tool can enhance the security level and optimize the performance of the system by tuning the windows registry settings. This security tool named registry tuning tool can assist the system administrator to optimize The registry settings in a simpler, faster way than manually configured tools. With added features such as dynamic-binding mechanism, multi-user environment support and user authentication, this tool is more usable, flexible and secure and applicable for any level of users. The tool developed then test by 50 users to see the usability, reliability, security and correctness of its functionality.