Addintools Mechanic - As you installing, uninstalling and updating software and hardware, even just open or close software, the Windows Registry will become larger, some invalid and confused keys&values burns. By and large, invalid keys and values always could be found in the Windows Registry of every computer, and they may lead to some Windows crashes and errors. Addintools Mechanic will help you to clean and repair these problems, defrag and compact the Registry. The confused and invalid keys&values of Registry will waste much time of computer, bring down the performance of Windows System, and make it unstable. Fixing these errors will improve system performance and avoid the risk of corruption. All cleanups that you done could undo now, so you could even restore all items that cleaned by this software. You could undo the operation of one time or one day. Certainly, you could just undo the keys and values that you selected. Addintools Mechanic now can scan 14 sections, more harmful keys and values would be found than ever and other software: Folders And Files (Deep); Help Files; Fonts; Sounds; User Shell; Software Locations; Startup Programs; Add/Remove Programs; Services & Drivers; Virtual Devices; Share DLLs; File Extensions; Custom Controls; Unused Software Keys. The scanning is very fast, it will scan the items that could be deleted securely, and skip the items that don't recommended to delete. Just a few clicks, everything done.