As the result of the increasing demand for greater functions, many applications are more and more complicated. Every program installation on Windows may cause the operating system to change in a big way, such as copying system files, modifying registry, generating log files, installing device drivers and system services. All of these operations will affect the system performance and occupy disk space. Installing and uninstalling software repeatedly is often the case, which will cause system slowdown, freezing or crashing. It may also lead to some mysterious error messages popping up or other new software can’t be installed correctly. Final Uninstaller has a scientific method of dealing with these problems.