From Alexander Asyabrik:
Registry Trash Keys Finder finds unwanted registry data. With Registry Trash Keys Finder you can streamline the registry and perhaps even improve Windows' speed and reliability. Registry "debris" from improper uninstallation routines is a major problem in Windows. RTKF helps users address this issue by giving them software that finally lets them take control of those sometimes "hidden" registry entries used by trial period software. Unfortunately this software has an annoying habit of leaving behind data which adds to the size of the registry. Install and then remove a few of these programs and you'll find your system getting slower and perhaps even crashing more.
What's new in this version:
Version 188.8.131.52 added an ability to switch between 32-bit and 64-bit modes on the fly, that is without restarting the program and fixed incomplete support of XP styles in "Program Options" dialog.