5+ best registry cleaner tools for Windows 10 [2021 Guide]

Madalina Dinita
by Madalina Dinita
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
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  • Using your PC on a daily basis can eventually lead to a build-up of residual files, so a registry cleaner is recommended.
  • In order to choose a good registry cleaner for Windows 10, you should consider the efficiency of the software.
  • Some of the registry optimizer software is even available as portable software, so installing these tools isn’t a must.
  • The best registry cleaners will optimize your PC's registry values, while also providing booting speed improvements.
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Windows is a complex operating system and this is what gives users the capability to customize it almost endlessly.

You can change almost any element in Windows, and for this reason, it is one of the most used operating systems on the planet.

Windows was designed to store all the important information and settings inside registry files, contained in the registry.

Let’s explore each of these elements so we can better understand how they function and why they exist in the first place.

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:

  • HKEY_CLASSES_ROOT
  • HKEY_CURRENT_USER
  • HKEY_LOCAL_MACHINE
  • HKEY_USERS
  • HKEY_CURRENT_CONFIG

Each of these keys holds 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 makes up the Windows registry, as it is also composed of different value types:

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

What are the best registry cleaners for Windows 10?

Restoro

At the top of our list, we chose 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 ensuring real-time protection against any possible threats, and repairing faulty registries and files from the moment they appear.

As a bonus, the system and crash analysis features contained in this software also ensure that you’re always informed about the general stats of your PC, like operating temperature.

The result of the scan gives you an easy-to-understand overview of what needs to happen to improve your experience, and how urgent each of those tasks is, as you can see from the image below.

All you have to decide in this situation is if you want to initiate the repair process at this point. If you do, then clicking the Start Repair button will start resolving all of the discovered problems one by one.

Restoro PC scan results

Other important stats monitor the frequency at which files and applications are causing crashes and enable you to resolve them promptly.

This comes especially useful if you don’t have the time to invest in checking each of the important aspects of your PC constantly, and eliminates the possible human error that could cause your system to suffer both in the short and long run.

Besides being capable of fixing a variety of issues, Restoro also works as an efficient PC optimization tool and allows you to enjoy your WIndows 10 system as if you just installed it.

And because running extremely demanding software and games can affect the CPU’s temperatures in time, monitoring this element can prevent you from experiencing a system crash, which might even result in losing your data.

Restoro measuring CPU temperatures

Using this tool means that your PC will no longer freeze or stop all of a sudden, and errors like the dreaded Blue Screen of Death will become a thing of the past.

Restoro also covers other useful areas, including virus protection, virus removal, a capability to fix error messages, and the capability to update & restore DLL files.

This powerful software includes a variety of very useful tools that can simplify your PC optimization and troubleshooting with just a few clicks of the mouse.

To name a few, it includes a capable antivirus tool, a registry editor, and DLL fixer, and a PC optimizer all bundled up into one efficient and intuitive program.

Restoro

Restoro

Restore, repair, and optimize your PC with this all-in-one software that takes care of all your needs.

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System Mechanic Ultimate Defense

Iolo System Mechanic Ultimate Defense continues our list of the best PC registry cleaner tools, with a great track record of successfully boosting PCs, optimizing processes, and doing so easily and without too much impact on your system resources.

Besides the capabilities mentioned above, this handy tool also optimizes, cleans, and repairs broken registry values without the need for you to weigh in on all the minutia.

Built to be easy to use and adaptable to the user, Iolo System Mechanic impresses with a simple yet slick user interface, that allows you to quickly access any option and deploy the troubleshooting steps required.

Iolo System Mechanic’s user-friendly dashboard

As we now have an overview of what the software is capable of, let’s dive deeper into each of these capabilities and explore them further.

Initializing the scan is as simple as clicking one button and drinking a few sips of your coffee while the software does the heavy lifting for you.

Being capable of identifying almost any threat to your PC’s wellbeing, a scan will give you useful information about Deceptive and Unwanted Programs, the memory you have available, junk files from the Internet that take space on your drive, security items that need to be removed, and even checks for internet connection problems.

Scanning process

When it comes to PC maintenance, this tool does it automatically and provides you with a useful menu in which you toggle variables on and off.

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

As you can see from the image above, you have the option to choose between a quick optimization process for your registry, or a complete session.

Even though the time it takes for these two processes to be completed differs, the accuracy of identification is very similar.

As the registry is an important component of Windows OS, keeping it working will ensure that you will not have any problems with your system. IOLO System Mechanic is the tool that can help you with that.

System Mechanic Ultimate Defense

System Mechanic Ultimate Defense

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

Free trialDownload

IObit Advanced SystemCare

Advanced SystemCare is probably the best-looking software on this list in terms of interface design. The software packs a lot of useful features, and even though we will focus mainly on the Registry Clean tool, the other elements deserve a mention as well.

The Clean & Optimize section of the software provides you with tickable boxes for a variety of tasks and provides a good overview when it comes to the software capabilities as well.

Because the software is created to be as easy to use as possible, you also have the option to tick the box next to Select all, and not waste any time with choosing what you want to be optimized exactly.

The toolbox section of this software enables you to extend its capabilities even further by choosing from options like Internet Booster, Driver Booster, Disk Doctor, and many others.

Choosing the Registry Cleaner from the System Clean section in the Toolbox presented above will initiate a scanning process that will not take long before identifying every aspect of your registry which is not correct.

Then, automatically, the tool will replace the corrupted data to improve your system’s stability.

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 shut down or restarts your PC automatically after the cleaning is done, and it also performs automatic backups.

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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Glarysoft Registry Repair

Registry Repair from Glarysoft 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.

Created with simplicity and efficiency in mind, Registry Repair automatically starts scanning your registry when you open it and identifies a specific number of problems, which are presented at the top of the window.

You then have the option to customize which of these areas you would like to exclude (if any), and then simply click the Repair your registry green button.

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.

If you ticked or unticked any boxes from the previous window, it would be recommended that you perform another scan, and you can do so by choosing the Rescan option next to the green button.

This will ensure that no registries are missed and that your system will be able to operate smoothly.

Even though it doesn’t have any other features like the rest of the programs we presented in this list, Glarysoft Registry Repair does its job well.

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

As opposed to some of the other options presented in this guide, the main focus of this software is registry cleaning but also includes other useful tools.

The Registry Cleaner section allows you to choose which of the areas of your PC and scanned and how you want the software to deal with possible issues.

Added to this, you can schedule registry cleaning at certain intervals, and also makes backups of your registry automatically in case you will ever need to revert the changes.

Run a System Scan to discover potential errors

Restoro Scan

Click Start Scan to find Windows issues.

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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.

The System Tuneup tab offers other useful tools that can optimize your system including a variety of factors and preferences.

To start the optimization process, you will just need to choose the options you’re interested in and click on the Optimize button.

Moving on, there is also a very useful tab called Registry Defrag, which, as you might have already figured out, defragments your Registry thus affecting further optimization of your system speed and efficiency.

While there is a downside to this program in that you always need to perform a system reboot after using it, the results are so good that it is worth it.

Get Wise Registry Cleaner

CCleaner

CCleaner is one of the most popular tools that besides cleaning your registry, offers a variety of other useful features.

These include removing cookies and caches from your browsers and improving the speed of your PC.

Once you open this tool, you will be greeted by a friendly-looking dashboard that offers you efficient access to all the tools you need.

Starting from the top, you get the Health Check section, which enables you to perform a quick scan of your system and see if there are any issues across all departments.

Depending on the results you get, you can simply click the respective issues from the bottom of the screen and follow the instructions to start fixing them one by one.

The Custom Clean option, as the name suggests, allows you to customize the way the PC cleanup process will be done, including which applications to be scanned.

Depending on your goals, you can choose between two main categories, Windows, and Applications.

In the Windows tab, you will find everything that is built into your operating system, like caches, cookies, and data from Microsoft Edge and Internet Explorer, and the data collected within the System and Windows Explorer areas (see images above).

In the Applications tab, you will find the same correlating information, but dealing with third-party applications that you installed on your system, including browsers and other data-collecting programs (see image below).

Inside the Registry menu, you will find a comprehensive list of all the registries found on your system. Exclude or include any of them by ticking the box next to them, and then simply click Scan for issues.

The identification process will start and will present you with a list of all the registry files that need to be fixed.

After this, you can simply take each of these issues one by one and click the Fix Issue button, or click Fix All Selected Issues for the program to automatically do it for you.

As an added bonus, CCleaner will automatically back up your registry before doing anything so you can restore it in case something bad happens.

CCleaner is also available as 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

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.

Even though is not as fully featured as other software options presented in this list, Tweaking Windows Repair still does a great job when it comes to repairing registry files across your system.

As soon as you open the program, you are welcomed by a screen that, even though seemingly rudimental, offers you quick access to all the important tools.

Starting the process involves the Pre-repair Steps, which ensure that your system is ready for a successful cleaning process.

Follow the on-screen instructions by clicking the Go To Step 1, 2, etc., and make the required settings.

Before diving into cleaning the registry it is recommended that you make a Registry Backup, which will be available at step 3.

When it comes to registry cleaning, ticking the Repairs button from the top will open the following screen, in which you will need to select which of the options you want to apply to this fix, and then click the Start Repairs button.

This section will include the registry errors as well, and you can just relax until the software does its job.

Even though sporting an old-school design, this software performs cleanups for your PC in a very professional manner.

Get Tweaking Windows Repair

What is a broken registry item?

In simple terms, broken registry items are corrupted or deleted registries that affect the way your PC works. This situation usually occurs when the values are not set properly or have been changed because of some third-party or manual incurrence.

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 uninstall of software on your PC, or even tampering with those while not knowing exactly what you’re doing.

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, following the steps described in the guide linked above will surely be of help.

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.

How can a registry editor improve your PC’s performance?

Besides solving any sort of issues that might be caused by a faulty registry value, there are many other benefits to using a good registry cleaner tool on your PC.

Here are some of the most common related improvements:

Boosting your PC performance

Even though in this case the exact registry cleaner tool you would use has a great significance, the optimization of all the values in the registry of your PC could improve the processing speeds of your system considerably.

In the same way that a cluttered hard drive (even without errors) affects the speed at which the data from the HDD is being read, the clutter of registry items causes the same slow-down effect.

Having any registry items that are not of use removed will enable your system to process the remaining ones even faster than before, as your system will not waste any more time processing useless data.

Beyond this, the optimization of the remaining registry files will involve setting the correct values and even modifying their location inside the hives and keys.

Enabling a faster booting process

Not all software presented in this list is equal when it comes to the improvement in your system’s booting times either.

Booting time improvements

As you can see from the graph above, while not having your PC’s booting time optimized takes a lot longer, using a registry editor with this capability can greatly improve the scores.

Restoro comes at the top with the best results and is closely followed by Iolo System Mechanic and IObit SystemCare.

Even though the others improve the booting times as well, the chart shows the difference between them.

Choosing the right software to optimize will depend very much on firstly identifying if you need a simple program that does only one job, or you wouldn’t mind having some extra useful features.

Our recommendation is to go for the software that offers a variety of capabilities, as even if at this point in time it might seem that they’re not useful, in the long run, you won’t regret it.

It’s always good to have software that can optimize your registry values. Added to that, using only one software to also improve booting times and speed is the most efficient.

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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