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Free Registry Cleaner Reviews: is it Cleaner that you need?

Updated on January 21, 2015

Do You Need a Registry Cleaner?

How do you tell it's time to do a Windows registry repair?

There are certain symptoms that can't go unnoticed, namely:

  • Windows boots damn slow;
  • It takes ages for the desktop to appear;
  • You cannot restart Windows other than by pressing "Reset";
  • Task Manager or other components are disabled;
  • Double-clicking on a folder produces some kind of error box;
  • Errors stating "RUNDLL32..." pop-up.

This is a very short list of symptoms you should pay attention to.

What should be added here, however, is that registry problems can have 2 main causes:

  • Improper use of Windows, programs, etc.
  • Malware activity;
  • A combination of both. 

What is Windows Registry

I bet you've seen people pleading for help on forums: "My Windows registry is corrupted!", "how can I clean up the registry?"

Windows registry itself consists of several files, which contain loads of important information, I mean - very important. It is the matrix of Windows, it contains all paths to all files, links, shortcuts, descriptions of operations to be executed, Internet connection settings, Network settings, and much more information needed for Windows system performance. In short, you never see working Windows without healthy registry. If it's corrupt, Windows is corrupt.

Sadly, there's NO computer running Windows that has error-free registry. Because the latter contains tons of records, it is very easy to make some change to it - via installing or uninstalling program, or simply running any application. Depending on how properly a program is coded, it can change or remove entries from the Windows registry.

With the time going by, users running different programs and performing various actions on a computer make those changes pile up until they reach certain "peak" when Windows starts behaving oddly. Say, it refuses to load Internet Explorer, or blocks C: drive so you can't get access to your folders and files. 

Let's not forget about virus infections as well - there are thousands pieces of malware that turn Windows literally upside down.

Note: it's not that difficult to remove 99,99% of infections using proper antivirus and antispyware tools. But it is next to impossible to repair the registry and have it functioning as new.

Therefore it happens that once antivirus software has cleaned out the malware, Windows starts working worse than it used to. It is because malware changes certain system entries to its needs, but antivirus programs consider those entries malicious (which is natural) and remove them, thus leaving "holes".

That's why antivirus cleaning often reveals the discrepancies and inconsistencies that were masked by malware.

Microsoft Windows System Error

Windows has recovered from a serious error
Windows has recovered from a serious error

Errors Caused by Spyware

Windows Explorer Error

Rundll32.exe Application Error

One of the most common errors: rundll32.exe error originates from corrupt registry
One of the most common errors: rundll32.exe error originates from corrupt registry


RUNDLL error caused by incorrect entry in the registry
RUNDLL error caused by incorrect entry in the registry

Internet Explorer Error

Internet Explorer Error
Internet Explorer Error
WARNING! This is an example of pop-up advertising FAKE programs for correcting PC errors
WARNING! This is an example of pop-up advertising FAKE programs for correcting PC errors


Because Registry is an integral part of Windows, it is crucial to be sure that you know what you're doing with it. Keep in mind that any modification done to registry may cause Windows stop booting or corrupt user's settings.

Backup Before Doing a Clean-up

Making registry backup on a regular basis is recommended for all computer users. In fact, everyone sooner or later comes to this conclusion after losing important data.

Since we're talking about Windows registry, let's stick to preserving solely this crucial part of the operating system.

There are 3 ways to do a backup backup:

  • manually;
  • with the help of backup tools and software;
  • automatically, using either Windows built-in backup utility or third-party software with task scheduling.

The first way generally is not recommended for most users. It's very easy to make a mistake and save only parts of Registry instead of entire hives.

The second option is most popular because it requires no special knowledge of Windows. There are lots of third-party tools that make the process of backup a breeze.

The third option is suitable for users who take extreme care of their workstations. Automatic backup is a cost-affective way to have a safe working copy of Windows registry for every day or week depending on how paranoid the user is ;)

Since Windows XP Microsoft has included its own utility for backing up the registry. It's called NT Backup and is installed by default in Windows XP Professional. Windows XP Home users can install it from the CD.

I'll shortly describe a nice backup tool called ERUNT (Emergency Recovery Utility NT).

ERUNT creates a complete backup set, including the Security hive and user related sections. There are no additional options other than to select the location of the backup files. This makes the process of backup a snap for any novice.

Once installed, ERUNT will create a backup of your registry in C:\Windows\ERDNT\{today's date} each time the system starts.

If anything goes wrong, go to the specified folder and double-click an icon named ERDNT. The program will walk you through the registry backup restore process.

So, should you get infected with a nasty malware, or want to completely reverse the changes made by a new application, all that is needed is to go to a ERUNT backup created before the problem occurred and run the restore utility.

Download ERUNT FREE Backup & Restore Utility.


ERUNT Windows Registry Backup Restore Utility
ERUNT Windows Registry Backup Restore Utility

Commercial vs. Non-commercial

There are opposite points of view as to whether commercial registry cleaners are better than free software options. Defendants of commercial products use 3 main arguments to support their stong belief:

  1. Commercial registry cleaners are updated regularly;
  2. only paid software owners receive professional support;
  3. programmers work harder when they are paid.

I don't quite agree with these points. To my mind, they are better applicable to PC security software where regular updates are crucial.

The problem with registry cleaners is that they are abundant on the market these days. Everyone tells you that registry cleaner is a must have unless you're absolutely computer illiterate.

Since nobody really knows what to expect from a perfect tool and what it is supposed to look like, software vendors use this unawareness to sell their regfixers to the masses. This is why there are so many low quality programs with poor scanning engines. Nicely looking, they under-deliver, to say the least.

On the contrary, free regcleaners can compete really successfully with market leaders. So why pay?

Eusing Free Registry Cleaner

Finally, we've come to Free Registry Cleaners.

I am not a fan of registry cleaners, especially commercial software. The reason behind my dislike is simple: I never know what is being fixed while the software runs. Any piece of software follows certain algorithms, but every computer has a registry with unique system state. When I boot up my PC in the morning, its registry is different from what it will be in the evening.

Moreover, current software tools with repair functions become resource hungry, require more memory and space, have lots of settings where novice users simply get lost. When you don't know what you're doing, it's very simple to get in trouble. This is one of the reasons why buying an expensive regcleaner way too often leads to even more errors in Windows!

But a free registry cleaner may come in handy. Sometimes there rises a need to scan the hives for errors and see if there are a lot of them. Then, you can always decide whether or not you should attempt to fix them.

One such tool is called Eusing free registry cleaner.

Eusing Free Registry Cleaner is used to correct the problem in a simple, two-step process. It scans the Windows Registry and identifies common errors.

Eusing can repair the registry by tidying things up. Eusing cleaner lets you first look at the errors it finds, and decide which to fix. If you get into trouble, the program lets you undo the changes.

Go to: Eusing.

Eusing Cleaner

Free Registry Cleaner
Free Registry Cleaner


EasyCleaner is another free tool helping when doing registry clean up.

This program goes a bit further than Eusing by providing additional useful options like:

  • finding unnecessary files;
  • removing Internet Explorer temporary files (history, cookies, etc);
  • managing start-up environment.

But of course it's primary function is scanning the registry for invalid or obsolete entries. When done, EasyCleaner lets you choose what to delete.

Download EasyCleaner.

EasyCleaner v2.0
EasyCleaner v2.0


Wise Registry Cleaner is available in both free and paid (PRO) versions. The latter adds ability to export registry entries into Excel, which, honestly, I don't find that important. The free version will remind you of the availability of PRO, but that's understandable, right?

Wise Registry Cleaner scans the Windows registry and finds incorrect or obsolete information in it. By fixing these obsolete entries, WRC will improve the system overall performance. (Do not expect a drastic boost, though; cleaning the garbage out of the registry doesn't equal to getting a new CPU or another gig of RAM).


  • additional information about each entry can be displayed;
  • found problems are divided into "safe to solve" and "not safe to solve". That is, choosing the first option prevents from getting more problems than you had before doing a clean up;
  • a back-up feature automatically saves a copy of the registry before doing any changes to it;
  • nice interface.


  • advertising of the "PRO" version may look irritating.

Download: Wise (FREE Version).

Note: Wise cleaner got a 4.5 rating out of 5 at

Wise Registry Cleaner v3
Wise Registry Cleaner v3

Free CCleaner PC Maintenance

Free CCleaner is a lot more than just a conventional registry cleaner. It is being recommended by advanced PC users and IT pros, so there must be a bunch of reasons supporting this software's popularity!

  • CCleaner removes temporary files, log files, browser URL history, cookies, and unused and old registry entries;
  • Features registry backup and restore option;
  • Alows secure file erasing without possibility to recover;
  • Available in 35 languages;
  • Advanced cleaning options (for lots of programs);
  • Download manager;

CCleaner is a must-have tool to go in conjunction with any antispyware software.

Download CCleaner.

Note: CCleaner received 5 star rating out of 5 at

CCleaner PC Maintenance Software

Misuses of Registry Cleaners

Now as you see that a good registry cleaner can solve a bunch of problems causing system instability or slow responsiveness, I feel it's necessary to add a word of caution here.

Do not hope that registry cleaning tools can repair all the problems. They can't.

Every time you initiate a registry scan, think twice why you are doing it. There's no worse usage for registry cleaners than a blind hope that "it will somehow make my computer run faster". A bunch of non-registry related problems, like bad drivers and fragmented files, can result in slow system performance.

But when used without a sound reason, "just because there's a shortcut on the desktop", almost any 'registry scan' can lead to:

  • installed programs acting weird or not opening at all. For example, AutoCAD software is very sensitive to all kinds of registry clean ups, which can lead to certain functions inside the software disabled;
  • mouse context menu containing invalid pointers or entries, which result in Windows Explorer glitches like inablity to access drives or folders in My Computer;
  • freezing;
  • blue screen of death (BSOD).

Let's recap: use a registry cleaner only for solving specific registry-related problem. Make a backup before doing a clean-up.

Better safe than sorry!

I'm not here to disencourage you, but rather to help you avoid unnecessary headaches caused by wrong use of registry repair tools.

Paid or Freeware?

First, there are no professional registry cleaners. It's nothing but a marketing trick to attract attention of the audience. "Pro" added to the name always looks solid and gets respect from potential buyers. However, the only registry tool that can be regarded as "professional" comes from Microsoft and is part of Windows CD.

Second, commercial Windows registry repair tools often come from unknown software companies or even individuals who consider the demand for such kind of tools to be on the rise. They plan to make some easy bucks selling buggy software to people who don't actually know what registry cleanup is all about. Some of these programs are sold at $30 per copy. I consider this price tag to be not adequate for a stand-alone application with very limited features. It might repair certain errors, but it might as well replace some keys with wrong values thus causing more troubles in the future.

There are more registry cleaners on the market than antivirus programs. This is because the latter are way more difficult to code and require on-going support. Behind any antivirus there's a team of hard-working IT pros. But registry cleaners mostly consist of same algorithms and fancy box covers to draw attention. Hype and promises are what you can expect from commercial products in the first place; not all of them deliver as promise to.


AML offers a free utility to safely clean up a Windows system and remove irrelevant entries from the Registry. Just several clicks are needed to help PC regain lost performance.

A built-in manager shows all programs that auto-load at startup and allows to disable those that are suspicious or unwanted. Very helpful in case your system is infected with stubborn trojan viruses.

AML Free Registry Cleaner finds and removes temporary files that pile up in the system eating the hard disk space. AML supports by default 22 file extensions, and their number can be increased if needed.

AML Free Registry Cleaner provides detailed information about programs and running processes.

AML works perfectly on XP, but there are reports about errors on Vista platform.

Download: Free Registry Cleaner by AML Software.


Despite the power that registry cleaners give to you, be cautious not to overuse it. Each registry repair tool, be it free or paid for, is a sharp knife which can cut the integral part of Windows literally in pieces thus making it unusable.

There are, however, cases when running a registry cleaner is the easiest way to solve common annoying problems, like those RUNDLL errors.

But I advise to use a registry clean-up tool as a last resort only. It is better to take care when installing new software. Avoid playing too much with new programs on a computer that is crucial to your work and hobby activities.

That being said, I hope that one day you'll find my hub useful ;) Your comments are welcome, and linking back is much appreciated.


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    • profile image


      10 years ago

      Here I have a good recommend for you: Tuneup360 and Norton system work, but the latter one is a little bit difficult. For the beginners, Tuneup360 is a good choice.

    • iwantlucky2011 profile image


      10 years ago from VIET NAM

      I like it :)

    • erikzett profile image


      10 years ago

      For registry cleaning I like Ace Logics - its not free but Ive tried lots of them and this really does the trick. It also does a registry compression and does a registry backup as well.

    • profile image


      10 years ago

      Thanx for great info. I have paid for a program. It Was $20 AUD and I am pretty happy with it but wondered if you knew weather it's any good or not.

      Advanced SystemCare PRO 3

      I do like that it gives many other free programs to choose from in the utilities tab and it's easy to use and allows U to opt what you want to clean and also checks security plus lots more. Would love to hear if it's any good or if I just got duped. I already have C Cleaner and use that aswell but I find it takes a very long time to digest compared to ASC 3. I bought it however due to a dll file error which would pop up out of no where aven in middle of gaming. Very anoying to say the least but neither programs would fix it. The anoying DLL error was caused by Paretalogic which was a previous paid reg cleaner that doesn't uninstall properly and leaves a task log that when it activates couldn't find the program anymore ofcourse. Very anoying issue which I finally found due to a helpful FREE write up about that specific error. REGCURE was the program and I definitely don't recommend it. If they can't get an uninstall right what is their program like. That is one of those that says free but U have to pay??? very anoying. Anyway thanks for confirming that they are good in small doses and now I know get it free which I already had for half of the case. Thanx Paul

    • birellar profile image


      10 years ago from India

      Everybody need registry cleaner, i like your hub about it, you shared such a great information.

    • profile image

      Nyathi Somo 

      10 years ago

      Very resourcefull article.I just wamted to clean my System because it is running slow but after reading this article on registry cleaner,i did a test on my drives and found out that most of them need to be updated

    • yellowstar2000 profile image

      Candice Collins 

      11 years ago from WestCoast Florida

      nice hub! I've been using AVG, Malwarebytes, and CCleaner for awhile now (all free) and have worked beautifully to keep me safe, secure and optimized. I've had good luck with all of these and even my computer guy said I've chosen wisely (being that he uses the same software I do and recommends them to all his clients).

    • sjames4444 profile image


      11 years ago

      I reinstalled autocad several times before realizing it was a registry cleaner messing up the program. I wish I would have read this hub before running any registry cleaners.

    • frogyfish profile image


      11 years ago from Central United States of America

      Great hub, though mostly above my head...another page to bookmark. Wow!

    • profile image

      Centrum Vitamins 

      11 years ago

      Great Hub. I agree that registry cleaners are great ways to fix your registry.

    • profile image

      Registry Easy Review 

      11 years ago

      Some of those freeware cleaners ARE trojan horses. I have personally found a few registry cleaners that provide a speed boost and more stability, but there are few that do what they say they will do. I haven't tested the Eusing freeware yet.

    • Curt Parker profile image

      Curt Parker 

      11 years ago from California

      Great Hub. You definitely covered all of the bases.

    • profile image


      11 years ago

      A question I have is, aside from products like Uniblue RegistryBooster which is advertised as free but only clears 15 errors before a fee must be paid, why are these registry cleaners available for free? A) manufacturers hope to sell upgrades or associated products? B) free products can be used as trojan horses to download unwanted software? C)they are genuine freeware or shareware provided by developers who make it available out of the goodness of their hearts or hoping for profit from small fees x many users?

    • men are dorks profile image

      men are dorks 

      12 years ago from Namibia

      Tx sweetness. I have AVG on my system and update it every single time before go online... and guess what. SuperAntiSpyware still found 9 spyware of cooies hidden. U r a star... Luv you. Pauli

    • profile image

      Registry Cleaners 

      12 years ago

      I have to agree with Douglas, this is a very useful page for registry cleaner info. I liked the use of the screen captures as people will be able to visually recognize their problems much easier. Contrary to neosix's comments, i have actually found registry cleaners to be very helpful, especially in the case of slightly older computers that have seen many updates, installs, deinstalls, etc.

      Well done!

    • neosix profile image


      12 years ago from Serbia

      Great article, but I do not believe in Registry Cleaners. I did a few tests and I'm convinced that they are not so useful. These tests can be found here:

      Once again, good work. Cheers!

    • charlemont profile imageAUTHOR


      12 years ago from Lithuania

      Douglas, I rarely use any registry cleaners at all. If needed, then my preferred are Eusing and CCleaner.

    • profile image


      12 years ago

      A very informative read, glad I found it. Will definitely tell others. One question though, out of the 5 free cleaners you listed, which one is your favorite?

      Is there one that you consider the best?

      Do you ever run more than one of them back to back since some do more than others?


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