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

Madalina Dinita
by Madalina Dinita
Former Managing Editor
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  • Using your PC on a daily basis can eventually lead to a build-up of residual files that not only take up disk space but can also lead to system errors and even crashes.
  • This guide contains what we believe to be the best registry cleaners currently on the market!
  • When dealing with residual data, or  faulty registry keys, good Optimization Software is a must.
  • For more great tweaking tools, check out our dedicated Utilities and Tools Hub.
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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 are the best tools to clean, repair, and optimize Windows 10’s Registry?

  1. Restoro
  2. Advanced System Care
  3. Registry Repair
  4. Wise Registry Cleaner
  5. Iolo System Mechanic
  6. CCleaner

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.

This 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?

Powerful technology

to repair and secure your PC

Optimize your PC
  • Removes malware threats
  • Detects dangerous websites
  • Restores max performance
  • Frees precious disk space
  • Replaces damaged Windows files

Read the full review

Restoro (Recommended)

Detects dangerous websites and blocks access
Restores your PC to peak performance
Replace damaged windows files
Restores and replaces DLL files
Removes malware threats
Free precious disk space
Repair virus damage
Fix error messages
Optimize Registry
Hardware repair
Can only fix Windows-specific apps, so it doesn't work on third-party programs

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.

Besides the fixing aspect, Restoro also works as an efficient PC optimization tool, allow you to enjoy your WIndows 10 system as if you just installed it.

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.

Long story short, if you want an antivirus tool, a Registry, and DLL fixer, and a PC optimizer all bundled up into one efficient and intuitive program, then you have everything you need in Restoro.



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Read more about Restoro in our in-depth review

IOLO System Mechanic

One subscription gets you an unlimited number of licenses
Creates Windows Registry backups
Great at boosting your PC
The price tag

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.

Get IOLO System Mechanic

Advanced SystemCare

A PC health monitor that is easy to read
Boosts the performance of your PC
Comes with a PC monitoring widget
Not expensive at all
Not as many PC boosting features as other similar tools

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.

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

Advanced SystemCare Pro

Advanced SystemCare Pro

Clean up your Registry and remove superfluous keys to enhance your PC performances by up to 200%!
Free trial Get it now

Run a System Scan to discover potential errors

Restoro Scan
Click Start Scan to find Windows issues.
Restoro Fix
Click Repair All to fix issues with Patented Technologies.
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.

Read more about IObit Advanced System Care Pro in our in-depth review

Registry Repair

Removes spyware
Provides you with a wide range of tools
Also great at updating third-party software
Only subscribers have access to the automatic maintenance feature

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. Get it today at a special price!

Wise Registry Cleaner

Wise Registry Cleaner
Multi-user cleaning
Efficient system tune-up
Comes with a Restore feature
Great at fixing common registry problems
You can schedule automatic registry cleaning
You need to reboot after every cleaning

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


Intuitive UI
Easy to install
Frequently updated
You can customize the scan range and file deletion exception list
Comes with other bundles software to which you manually need to decline during CCleaner's setup process

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

These were 6 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 access these registries fairly easy, 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.

FAQ: Learn more about Registry Cleaners

  • Does Windows 10 have a built-in registry cleaner?

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

  • Why buy a registry cleaner when there are plenty of free alternatives?

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

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  • Should I attempt manually cleaning my registry?

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.

Editor's Note: This article was originally published in March 2016 and was revamped and updated in January 2021 for freshness, accuracy, and comprehensiveness.
  • Above list is ok but next time add QuickGenie also. I personally use this registry cleaner from past few month and its really working very nice

    • windows 10 has deleted ccleaner twice. I’m a paid member to ccleaner. So not sure why they have not fixed this problem; for they have known for years; about the complaints. I will not use ccleaner again… since they can never seem to find my email; thus forcing me to buy it again. Fck them and the horse they rode in on (called profit and judas).