Registry problems can really slow down your computer. if you are looking for a Free and powerful registry cleaner then I suggest you to check RegSeeker. RegSeeker includes a very powerful registry cleaner and it can also display a lot of information like your startup entries, several histories (even index.dat files), installed applications and much more. So you will get a detailed idea on which applications are running in the startup.
RegSeeker will help you to search for any item inside your registry. You can export and delete the results, open them in the registry. If you are looking to tweak your registry, RegSeeker also includes a tweaks panel to optimize your Registry. This will help you to run your system faster. The latest version of RegSeeker includes a file tool to search for duplicate files, bad shortcuts and more. So you can free up your disk space by deleting the duplicate content. This will also make your system faster.