WinASO Registry Optimizer is an advanced registry cleaner and optimizer for Windows that allows you to safely clean and repair registry problems with a few simple mouse clicks. By fixing the obsolete information and adjusting the parameters in the Windows Registry, it significantly speeds up your system. WinASO Registry Optimizer is well designed to fix common problems such as denied access to missing drives and disks and illegally modified Internet Explorer pages. Substantial testing has been done on this software to ensure the safety of your system. We have not received any complaints about the system stability. Meanwhile, WinASO Registry Optimizer offers the powerful function of Privacy Cleaner, effectively scanning and clearing the history of the use of programs and applications in your system.Version 4.2 has a newly added feature of Privacy Cleaner, support for Mozilla Firefox 3, and support for the Microsoft Office 2007.