AOMEI Partition Assistant for Cleanup
Best Free PC Registry Cleaner: Clean Registry Files Safely and Quickly
There are a lot of registry cleaners for Windows PC. If you are wondering which one to choose, you can check this article to get the best free PC registry cleaner to delete useless registry files in one minute.
By Hedy / Updated on July 16, 2025
What is a registry?
The registry is a storage place to store all the information about the system and programs. The more you use the computer, the more information about applications will be saved on your registry. When you uninstall an app from your PC, the related files continue to stay in the registry even if it is of no use to the system. These unused and junk registry files can bloat your memory and slow down your computer.
Therefore, you may want to remove these redundant entries from the Windows registry so that your computer performance will not be affected. But before starting, please note that if the registry is damaged, Windows will start abnormally. So, you need the right tool and way to clean the registry. In such a case, the best free PC registry cleaner comes into sight.
What can a PC registry cleaner do for you?
A registry cleaner for Windows PC is a program that can find and delete unnecessary entries from the Windows Registry. The best PC registry cleaner usually has the following benefits:
✶ Do a thorough and complete scan. It will scan all the hard drives on your computer rather than deleting registry files on a single disk.
✶ Delete obsolete and useless entries. It can remove invalid entries, missing file references, and broken registry links in the registry.
✶ Eliminate potential errors you may meet. Some malware and viruses are hidden in rogue entries. It’s available to protect your PC from some unexpected errors brought by malware and viruses.
✶ Boost Windows performance. After deleting useless registry data, some room will be freed up on the disk, which can slightly improve the read and write speed of the computer.
What is the best free PC registry cleaner?
Where to find such a registry cleaning program that fulfills all the features mentioned above? Just right here, we recommend AOMEI Partition Assistant for Cleanup, the best free PC registry cleaner. It is freely available for all editions of Windows 11/10/8/7 and Servers. It’s a wonderful tool with a range of features and an intuitive user interface that makes it easy for everyone, especially for those computer novices to clean up computers. This is a professional and powerful disk cleanup tool that scans and deletes all duplicate and junk files from the system, including registry files, temporary files, Recycle Bin files, etc.
AOMEI Partition Assistant for CleanupFree Up Disk Space To Keep Your PC Running Smoothly and Efficiently
Warning: Since the registry is a critical part of the Windows system, improper changes to the registry can result in system crashes. It's important to back up essential data before performing the registry cleanup.
Step 1. Install and launch AOMEI Partition Assistant for Cleanup. Click the "Clean Junk Files" tab.
Step 2. Click the "Scan Now" button to start the process of scanning junk files.
Step 3. After the scan process is finished. All system junk files (including recycle bin files, temporary files, log files, invalid shortcuts, and so on) and registry junk files (including DLL registry, system registry, and program registry) will be displayed.
You can also click the button behind to view the junk files details.
Step 4. And, you can click the button behind to locate the file.
By default, the program will select some junk files to clean up, for example, temporary files, log files, and so on. You can also manually check to select more or uncheck to deselect fewer listed junk files. Or, click "Select All" to select all junk files to clean up if you need to clean up all.
Step 5. After selecting junk files that are not needed anymore, you can click the "Clean Now"button to start the cleanup.
The process of the cleanup might take time, and the selected files will be cleaned up. After the process is finished, you will get a cleanup completed window displaying how many files you have cleaned and not yet cleaned.
2 ways to clean the Windows registry without a PC registry cleaner
If you don't want to download a third-party clean my PC registry cleaner, you can read this section to get two inbuilt Windows utilities to clear Windows junk registry files safely.
Way 1. Clean Windows registry using Registry Editor
Registry Editor itself is a place to manage your computer files. You can change the location of documents via the registry, and you can certainly delete files from the registry editor, but you have to be careful to avoid deleting the wrong file.
Step 1. Press "Windows + R" at the same time to open the Run box. Input "regedit" or "regedit.exe" and click "OK" to run the Registry Editor window.
Step 2. On the left side of the window, you need to find HKEY_LOCAL_MACHINE.
Step 3. Under HKEY_LOCAL_MACHINE, you need to navigate to SOFTWARE. All folders under the SOFTWARE directory are programs installed on the PC, and deleting these files that have nothing to do with the system.
Step 4. Here, you can delete the registry file of the target program. Right-click it and choose "Delete".
Way 2. Clean Windows registry using CMD
Another way to clean the registry is to run commands in CMD. Here are two cases: one is to clean system files including registry files and resolve errors, and the other is to delete registry keys and values directly via command lines.
Step 1. Type "cmd" in the search box of the Start menu and click on "Run as administrator" to open Command Prompt.
Step 2. In the terminal window, type the commands and press "Enter" to execute:
dism /online /cleanup-image /restorehealth
If there were any issues, the dism order would fix them. Your PC will run faster after the scan, and the corrupt registry will also be fixed by this command.
Step 2. Type the following commands and press "Enter" to execute:
reg delete HKEY_CURRENT_USER\Software\DeleteTestKey /v DeleteTestValue /f
You can change the path and value according to your need like:
reg delete HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer/v CleanShutdown /f
Conclusion
Cleaning the registry is a perfect decision to boost the system's performance. From this passage, we have covered three ways to help you clean registry files. If you have a good command of computers, you can choose to use Windows built-in tools to delete files in the registry, but if you don't know much about computers, you'd better use the best free PC registry cleaner to avoid some severe consequences.
