7 best registry cleaner tools for Windows 10 [2021 Guide]

Madalina Dinita
by Madalina Dinita
Former Managing Editor
Madalina has been a Windows fan ever since she got her hands on her first Windows XP computer. She is interested in all things technology, especially emerging technologies -- AI and DNA computing in... Read more
Affiliate Disclosure
  • Using your PC on a daily basis can eventually lead to a build-up of residual files, so a registry cleaner is recommended.
  • You may choose a registry cleaner for Windows 10 from our list to efficiently deal with residual data.
  • Some of them are even available as portable software, so installing these tools isn’t a must. Take a look below if you like this idea.
  • The best registry cleaners like the ones from our list optimize your PC with ease, so waste no more time.
Registry cleaner tools for Windows 10
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Windows is a complicated operating system, but it is complicated only because of how customizable it is in terms of its behavior.

You can practically change everything in Windows – that’s also why it falls prone to so many attacks. So where does Windows store all these settings? In the registry.

What is a Windows Registry?

In simple terms, Windows Registry is a database that exists within the Windows 10 operating system, and it is the place where all of the most important information is stored.

This includes, but is not limited to, information, user settings, and a variety of other parameters that affect both the hardware components and the software installed on your PC.

However, there’s nothing to gain about knowing what a Windows Registry is if you have no idea how to access it.

In order for your system to run impeccably, you need to make sure you aren’t dealing with broken registry items.

What is a broken registry item?

In simple terms, broken registry items are basically corrupted or deleted registries that affect the way your PC works.

Their existence can lead to a variety of problems, including frequent errors, the inability to open apps, driver issues and hardware unresponsiveness, BSoD errors, and more.

Broken registry items can be caused by frequent installs and uninstalls of software on your PC, or even tampering by those with not enough experience.

Fortunately enough, there are ways of tracking any changes that occur with your registries, and this can be done with the help of dedicated registry monitoring tools.

Alternatively, there are even ways through which you can undo registry changes altogether, and while these usually involve a certain degree of skill and experience, we laid the steps out for you in this step-by-step guide.

But when you have so many things to keep track of, the registry can get pretty messy after a while and you’ll end up having to clean up your registry.

Alternatively, if you feel like you might damage your PC more that you could do it any good, you can also employ the use of a registry cleaner.

What is a registry cleaner?

A registry cleaner is a third party software tool that helps you fix any damages that may occur to your registry database.

Most registry cleaners work by comparing your PC’s current registries to an online template or database of its own, and it basically replaces whichever entries it deems to be broken, missing, or of an incorrect value.

Our list will take you through some of the best Windows 10 registry cleaners out there. You can also read our post in which we show how to fix a corrupt registry on Windows 10.

Since you’ll be using third-party tools to change the registry files of your PC, make sure you know how to restore your registries by yourself in case something goes wrong, even without a backup.

Which are the best registry cleaners for Windows 10?


Topping out our list is a software that not only repairs the damage caused by malware but also removes the malware itself.

It works by efficiently scanning your PC for any errors and irregularities by comparing it to a database, and immediately fixes the issues.

More so, the program can be set to monitor your system constantly, thus ensure real-time protection against any possible threats, and repairing faulty registries and files from the moment they appear.

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All in all, using this tool means that your PC will no longer freeze or stop all of a sudden, and errors like Blue Screens of death will become a thing of the past.

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IOLO System Mechanic

This tool is not only a PC booster and process optimizer, but it also cleans, repairs, and optimizes your registry.

The entire process has two big steps: automatic repair of registry problems (cleaning, optimizing and issue detection) and automatic repair of registry fragmentation problems.

The registry is an important component of Windows OS and keeping it working and clean will assure you that you will not have any problems with it. IOLO System Mechanic is the tool that can help you with that.

IOLO System Mechanic

IOLO System Mechanic

As its name suggests, this software is a real mechanic that will also optimize your PC after repairing your registry.

Free trialVisit website

IObit Advanced SystemCare

Advanced SystemCare is probably the best-looking software on this list in terms of interface design. Although the software itself packs a lot of features, the only part relevant to us is the Registry Clean tool.

If you are not too tech-savvy, this tool is great for you because the interface is very simple to understand, and it is quick no matter how many errors your registry has.

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Run a PC Scan with Restoro Repair Tool to find errors causing security problems and slowdowns. After the scan is complete, the repair process will replace damaged files with fresh Windows files and components.

It also lets you shutdown or restarts your PC automatically after the cleaning is done, and it takes automatic backups as well.

IObit Advanced SystemCare

IObit Advanced SystemCare

Clean up your Registry and remove superfluous keys to enhance your PC performances by up to 200%!

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Registry Repair

Registry Repair is a tool much like others on the list, it scans your registry and tells you if there are any errors present, and if there are it will attempt to fix them.

What makes this different from the other tools is the number of details it shows you about the errors.

It can tell you exactly what is wrong making it easier for you to decide if you want to do something about it. The scanning speed is impressive and the results are thorough.

Registry Repair

Registry Repair

Safely scan, clean, and repair invalid registry entries with Registry Repair. You won’t regret this choice!

Free trialVisit website

Wise Registry Cleaner

Wise Registry Cleaner

Wise Registry Cleaner has a simple and good looking interface that works well and goes through your registry faster than most other programs on this list.

You can also schedule registry scans, so it will wisely scan your registry every once and a while and notify you if anything needs to be cleaned.

Moreover, it will automatically backup your registry in case anything goes wrong.

While there is a downside to this program in that you always need to perform a system reboot after using it, there are ways through which you can avoid this.

Get Wise Registry Cleaner


CCleaner is the most popular tool to clean your registry. The software itself isn’t specifically made to just clean your registry, but it packs one of the best tools to do so.

It will automatically backup your registry before doing anything so you can restore it in case something bad happens.

CCleaner is also available as a portable software so you don’t even need to install it. It also comes with a paid version that can monitor your PC for changes in real-time.

Get CCleaner free edition

Tweaking Windows Repair

When the idea of an old-school design sounds like music to your ears, rest assured that there is no better choice than Tweaking Windows Repair. This safe tool can help you fix a variety of Windows problems.

Well, the list is longer than expected and it includes issues with Internet Explorer, Windows Firewall, registry errors, besides being an ideal registry cleaner tool.

Moreover, do keep in mind that it easily restores Windows original settings solving and its interface is user-friendly even for newbies.

Get Tweaking Windows Repair

These are some of the best registry cleaners available for Windows 10.

The fact is, the longer you use your PC, the more of a mess Windows Registry will turn into, so cleaning it becomes a requirement at some point. Otherwise, your PC becomes very slow to use.

How do I access Windows Registry?

Windows Registry can be accessed in three ways:

Method 1:

  • In the search box on the taskbar, type regedit.
  • Select the top result for Registry Editor.

Method 2:

  • Press the Start button.
  • Type in run and open the Run console.
  • Enter regedit and press OK.

Method 3:

Use a dedicated registry finder that will do the job for you.

Of course, accessing these registries is only possible if you have the appropriate registry permissions. Having issues with registry permissions can not only prevent you from accessing the registries themselves, but also prevent you from installing software.

To read more about the issue, check out this in-depth article.

Advanced users can easily access these registries, and knowing which ones affect which components is made easy by the fact that they are organized into Registry Keys.

What are registry keys used for?

As mentioned above, keys are ways through which your registries are organized based on their functions, and there are 5 in total:


Each of these keys hold specific information, so those that have a certain experience with such things can easily modify their PC’s settings en-masse just by changing a few digits in the right registry.

However, keys aren’t the only thing that make up the Windows registry, as it is also composed of different value types:

  • REG_SZ
    • String value
    • A multi-line string value
    • Unlike the previous value type, this is an expanded string value
    • As the name says, this is a binary value
    • This is similar to a binary value, but also supports 32-bit decimal and hex values
    • This is similar to DWORD but it’s stored as a 64-bit value

What’s your favorite tool for keeping your PC fresh and fast? Do share your experience with us via the comments section below.

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Frequently Asked Questions

  • Unfortunately, no. Microsoft does not support the use of registry cleaners.

  • Most free registry cleaners might contain spyware, adware, or viruses. If you decide to install a free registry cleaning utility, also consider adding a reliable antivirus tool.

  • In short, no. The Registry is a system file that contains important information about your PC and it does not store back-up by default.

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