Karmazoo Virus Removal (Mac and Windows)

Keep in mind, SpyHunter’s malware detection tool is free. To remove the infection, you'll need to purchase its full version. More information about SpyHunter and steps to uninstall.

This page aims to help you remove Karmazoo. These a.karmazoo.online virus removal instructions work for Safari, Chrome, Firefox, as well as every version of Mac and Windows.

Take the time to read though this part. It is important. Karmazoo is a computer virus of the Adware family. This is a type of malware easily distinctive for the large amounts of advertisements that it will subject affected users to. Most security experts gather around the opinion, that adware applications are a relatively low-priority threats, just a step above the least harmful Potentially Unwanted Programs or PUPs as they are mostly known. That doesn’t mean that you should ignore Adware, on the contrary – you should remove it before it can cause you some real troubles.

Karmazoo Virus



Name Karmazoo
Type Adware/Browser Hijacker
Danger Level Medium.
Symptoms  Numerous unwanted ads, browser redirects like a.karmazoo.online, limited device’s responsiveness.
Distribution Method E-mails, torrent and other file sharing websites, fake ad links.
Detection Tool



If the removal guide helps you, remember: a thank you in the comments goes a long way to warm our hearts!
1: Enter Safe Mode.
2: Remove Karmazoo from Chrome, Firefox and Internet Explorer.
3: Remove attachments to browser shortcuts.
4: Uninstall the virus from your Add/Remove Programs.
5: Permanently delete the threat from Task Manager’s processes.
6: Uninstall the virus from Regedit and Msconfig.

How were you infected?

There are many different ways in which you might have fallen victim to Karmazoo. We will list the most popular ones and also provide some useful tips on how to prevent this from happening ever again in the future.

  • A very old, but still quite popular trick to spread malware is the e-mail attachments method. You have probably heard about this already, but still – infected files are often attached to e-mails and send to unsuspecting users. Be especially careful with mails from people you don’t know, but remember friends can also send you a virus if their PC is infected. It is advisable to scan all attached files before opening them, even if it looks like a message from a reputable company or government agency.
  • Be very cautious and mistrustful, at least until proven otherwise, with files downloaded from torrents and other file-sharing websites. We are not advocating against this type of file-sharing, only against the little-to-none actual control of what gets uploaded. It is fairly easy to happen upon on infected files, so please diligently scan everything thoroughly before opening it.
  • It probably should go without saying, but anything downloaded from the fake pop-up ads and unconfirmed sources, that you might have been redirected to, is quite the recipe for disaster. This is one of the premier ways through which malware is spreading and you should avoid it at all costs.

Before plunging into the actual removal process, and we can appreciate that you are eager to do just that, we would like to give you a few final advises. Virus creators have found a way to battle free online guides like ours by changing some aspects of their creation, as might also be the case with a.karmazoo.online. Multiple versions of the Adware are spawned, each requiring a slightly different approach for its removal. We’ve done our best to provide a complete guide, but is quite possible that you may find some parts of our instructions to be redundant or slightly off with your own issue. If that is the case do not worry but instead move on with the remainder if the guide. If you need additional instructions or something is not quite clear then do not be shy to ask away freely – in the comments section below.

Karmazoo Virus Removal

ATTENTION! If you are a Mac user, use this guide instead.



Reboot in Safe Mode (use this guide if you don’t know how to do it).

This was the first preparation.


To remove parasite, you may have to meddle with system files and registries. Making a mistake and deleting the wrong thing may damage your system.
Avoid this by using SpyHunter - a professional Parasite removal tool.

Keep in mind, SpyHunter’s malware detection tool is free. To remove the infection, you'll need to purchase its full version. More information about SpyHunter and steps to uninstall.

The first thing you absolutely must do is Reveal All Hidden Files and Folders.

  • Do not skip this step. Karmazoo may have hidden some of its files and you need to see them.

Remember, Karmazoo has probably already spread to all web browsers located at your drives. Usually people forget about that and only clean-up the favorite Chrome or Firefox browser and leave the rest unattended. That could be a potentially very big mistake as this type of malware is known to be able to come back. So act accordingly by repeating Step 2 for all infected browsers.


ie9-10_512x512 Remove the Malware from Internet Explorer:

Open IE, click IE GEAR —–> Manage Add-ons.

pic 3

Find the malware. Remove it by pressing Disable. If your Home Page has been hijacked, go to IE GEAR —–> Internet Options> change the URL to whatever you use —> Apply. Reset Your IE Settings

firefox-512 Remove Karmazoo from Firefox:

Open Firefox, click mozilla menu (top right) ——-> Add-ons —-> Extensions.

pic 6

Find the adware/malware —> Remove. Refresh Your Firefox Settings.

chrome-logo-transparent-background Remove Karmazoo from Chrome:

Start Chrome, click chrome menu icon —–>More Tools —–> Extensions. Find the malware and select chrome-trash-icon

pic 8

Click chrome menu icon —> Settings —> Search —> Manage Search Engines. Delete everything but your normal search engines. Reset Your Chrome Settings.


Right click on the browser’s shortcut —> Properties.

NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge) as well.


Properties —–> Shortcut. In Target, remove everything after .exe.


Hold together the Start Key and R. Type appwiz.cpl –> OK.


You are now in the Control Panel. Look for suspicious entries. Uninstall it/them. If you see a screen like this when you click Uninstall, choose NO:


Hold the Start Key and R copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

hosts_opt (1)

If there are suspicious IPs below “Localhost” – write to us in the comments.

Open the Start Menu, type “Control Panel” in the search box —> Enter. Network and Internet —> Network and Sharing Center —> Change Adapter Settings. Right-click your Internet connection —> Properties.

In Networking, left click Internet Protocol Version 4 —> Properties. If everything is normal, your window will look like this:

DNS Settings

If it’s not, click on the two “automatic” choices. NOTE: If you are in a domain network, contact your Domain Administrator so he can make these settings, or this may break your Internet Connection.


Press CTRL + SHIFT + ESC simultaneously. Go to the Processes Tab. Try to determine which ones are a virus. Google them or ask us in the comments.


The end of your Karmazoo problem is nigh. Yet you can’t let complacency creep in. The last part of our instructions are extremely important and considerably complex, especially for inexperienced users. Keep that in mind as even a small mistake or inaccuracy might have devastating effects on your device, rendering it essentially useless and requiring major system overhaul.

Having written that, we encourage our users to continue with our removal instructions only if they feel completely at ease with the fact that things might get significantly screwed up and only if they are feeling confident enough to try this on their own. If not, we would recommend and alternative solution – the download and installation of a professional anti-malware scanner and remover.



Right click on each of the virus processes and select Open File Location, then End the process. Copy the folders somewhere (as a backup if you make a mistake) and delete the directories you were sent to.


Type msconfig in the search field and hit enter. A window will pop-up:


Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

Type Regedit in the windows search field and press Enter.

Once inside, press CTRL and F together and type the virus’s Name. Right click and delete any entries you find with a similar name. If they don’t show this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random