Working with the registry is quite similar to working with files and folders.

In this article, the key concepts of the registry will be introduced to you and this will help you to improve PC performance. We get that by cleaning your registry — registry analyzing to delete the dump registry entries.


PartⅠ Registry Analyze

What is Registry?

Registry is the core database that restores all the setting data of the operating system, hardware device and software programs, which makes sure all of these running well. We can master our PC by the registry if you are good at registry editing.


Registry Editor

We open registry editor to add, change and delete registry keys and values, to get a faster PC experience or personalized settings like creating a quick shutdown command (we will talk about that in the future text).


Registry Structure Analyze

There are five root keys in the registry.

  • HKEY_CLASSES_ROOT: holds information of registered application
  • HKEY_CURRENT_USER: stores the current user of the PC, all attributes of the desktop environment and network connections.
  • HKEY_LOCAL_MACHINE: contains the settings for PC's hardware, system software, and applications.
  • HKEY_USERS: contains subkeys for all users of the PC.
  • HKEY_CURRENT_CONFIG: gathers all the information when Windows first launches. The data restored in this hive is regenerated each time your PC boots.

Here is an easy way to understand where registries hive, key, subkey, and value belong in the Windows Registry:

HIVE\KEY\SUBKEY\SUBKEY\...\...\VALUE

As you can see in the example below, while there may be multiple registry subkeys below a hive, there's always only just one registry hive within each location.

HKEY_CURRENT_USER\Control Panel\Desktop\Colors\Menu

  • HIVE: HKEY_CURRENT_USER
  • KEY: Control Panel
  • SUBKEY: Bluetooth
  • SUBKEY: Colors
  • VALUE: MenuBar


PartⅡ Delete the dump keys

What is the dump key?

Now you may have the basic ideas about keys and subkeys, at least you can locate them. The dump keys include both of them. You should decide the dump ones by the following rules:

Rule One: The ones belong to the uninstalled software or applications.

Rule Two: The useless DLL file with zero value, which means they are empty with no shared file.


Where to find the dump keys?

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
  • HKEY_LOCAL_MACHINE\SOFTWARE.


How to Delete the Dump Keys?

The steps include opening registry editor, so you do not have to worry about the details.

A. Open Registry Editor

->Press Win+R, and a dialogue box pops.

->Type in regedit and press enter.


B. Locate the right place

Take removing the uninstalled leftover files for example.

->Click HKEY_LOCAL_MACHINE and open the keys (folders).

->Scroll up to SOFTWARE subkey (folder).

->Scroll up to Microsoft\Windows\CurrentVersion\Uninstall subkey (folder)

They have listed alphabetically. It is easy to find.


C. Catch the Uninstalled Software File and Delete

->Right-click on the file you want to remove and delete.


D. Use a professional tool 

Registry cleaners will save you all the effort to use the registry editor to clean registry. As long as you are not careful enough to modify registry, your PC will end up with death. Try Neptune SystemCare 2017.

The in-app Registry Cleaner will analyze the registry and delete the dumps keys with one click.