Removing the Multicheck Checkbox Checker adware-type browser extension
Written by Tomas Meskauskas on
What is Multicheck Checkbox Checker?
While inspecting suspicious sites, our researchers discovered one offering fake Chrome browser updates that installed the Multicheck Checkbox Checker browser extension. This piece of software is presented as a tool that simplifies the action of checking/unchecking boxes on the Web. Instead, Multicheck Checkbox Checker operates as adware - i.e., runs intrusive ad campaigns and spies on users' browsing activity.
Multicheck Checkbox Checker adware overview
Adware is designed to display advertisements on visited websites (or other interfaces). These ads endorse various scams, untrustworthy/harmful applications, and malware. Once clicked on, some intrusive adverts can execute scripts to perform downloads/installations without user consent.
It is pertinent to mention that any legitimate content encountered via these advertisements is highly unlikely to be endorsed by the actual developers. Scammers often abuse the affiliate programs of genuine products/services - in order to acquire illegitimate commissions for the promotion.
Advertising-supported software may not run intrusive advert campaigns if specific conditions are unsuitable (e.g., incompatible browser/system specs, particular sites not visited, etc.). Even if Multicheck Checkbox Checker does not display ads - that does not mean that its presence is harmless.
Furthermore, Multicheck Checkbox Checker collects private data. Adware typically gathers visited URLs, viewed webpages, searched queries, account log-in credentials, personally identifiable details, credit card numbers, and other vulnerable information. The collected data can then be shared with and/or sold to third-parties (potentially, cyber criminals).
To summarize, the presence of software like Multicheck Checkbox Checker on devices can result in system infections, serious privacy issues, financial losses, and identity theft.
| Name | Ads by Multicheck Checkbox Checker |
| Threat Type | Adware, Unwanted ads, Pop-up Virus |
| Browser Extension(s) | Multicheck Checkbox Checker |
| Supposed Functionality | Box checking/unchecking tool |
| Symptoms | Seeing advertisements not originating from the sites you are browsing. Intrusive pop-up ads. Decreased Internet browsing speed. |
| Distribution Methods | Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers. |
| Damage | Decreased computer performance, browser tracking - privacy issues, possible additional malware infections. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
Adware examples
We have analyzed countless adware samples; tabs info, Streamic, and page styles are merely a couple of our latest finds. Advertising-supported software usually looks ordinary and innocuous.
Users are lured into download/installation and/or purchase with various "handy" features. However, these functionalities are rarely operational. Note that functionality is not an indicator of a program's legitimacy; hence, even if adware does operate as promised by its promotional material - it remains a threat to device and user safety.
How did Multicheck Checkbox Checker install on my computer?
We obtained Multicheck Checkbox Checker from a scam site falsely claiming that visitors need to update their Chrome browsers. Advertising-supported software can also have "official" promotional webpages. Most access such websites via redirects caused by mistyped URLs, pages using rogue advertising networks, spam browser notifications, intrusive ads, or installed adware (with browser force-opening abilities).
This software can also be bundled (packed together) with regular programs. Download from untrustworthy sources (e.g., freeware and free file-hosting sites, P2P sharing networks, etc.) and rushed installations increase the risk of allowing bundled content into the system.
Additionally, adware is spread through intrusive adverts. Once clicked on, some of these advertisements can execute scripts to perform stealthy downloads/installations.
How to avoid installation of adware?
We strongly recommend researching content and downloading it only from official/verified channels. When installing, it is crucial to read terms, inspect possible options, and use the "Custom/Advanced" settings to opt-out of all additions.
We advise being careful while browsing since illegitimate and malicious online material usually appears ordinary/harmless. For example, intrusive advertisements may look innocuous yet redirect to highly questionable websites (e.g., gambling, pornography, adult-dating, etc.).
In case of encounters with ads and/or redirects of this kind, check the device and immediately remove all suspicious applications and browser extensions/plug-ins. If your computer is already infected with Multicheck Checkbox Checker, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this adware.
Screenshot of a deceptive website used to promote Multicheck Checkbox Checker adware:
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:
- What is Multicheck Checkbox Checker?
- STEP 1. Uninstall Multicheck Checkbox Checker application using Control Panel.
- STEP 2. Remove Multicheck Checkbox Checker ads from Google Chrome.
- STEP 3. Remove 'Ads by Multicheck Checkbox Checker' from Mozilla Firefox.
- STEP 4. Remove Multicheck Checkbox Checker extension from Safari.
- STEP 5. Remove rogue plug-ins from Microsoft Edge.
Multicheck Checkbox Checker adware removal:
Windows 11 users:
Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.
Windows 10 users:
Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
macOS (OSX) users:
Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.
In the uninstall programs window, look for "Multicheck Checkbox Checker", select this entry and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted application (which causes Multicheck Checkbox Checker ads), scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Remove Multicheck Checkbox Checker adware from Internet browsers:
Video showing how to remove potentially unwanted browser add-ons:
Remove malicious extensions from Google Chrome:
Click the Chrome menu icon 
(at the top right corner of Google Chrome), select "More Tools" and click "Extensions". Locate "Multicheck Checkbox Checker" and all other recently-installed suspicious extensions, select these entries and click "Remove".
Optional method:
If you continue to have problems with removal of the ads by multicheck checkbox checker, reset your Google Chrome browser settings. Click the Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plugins from Mozilla Firefox:
Click the Firefox menu 
(at the top right corner of the main window), select "Add-ons and themes". Click "Extensions", in the opened window locate "Multicheck Checkbox Checker" and all other recently-installed suspicious extensions, click on the three dots and then click "Remove".
Optional method:
Computer users who have problems with ads by multicheck checkbox checker removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active, click Safari menu, and select Preferences....
In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.
Optional method:
Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...
In the opened window select all history and click the Clear History button.
Remove malicious extensions from Microsoft Edge:
Click the Edge menu icon 
(at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.
Optional method:
If you continue to have problems with removal of the ads by multicheck checkbox checker, reset your Microsoft Edge browser settings. Click the Edge menu icon (at the top right corner of Microsoft Edge) and select Settings.
In the opened settings menu select Reset settings.
Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.
- If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.
Summary:
Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.
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Frequently Asked Questions (FAQ)
What harm can adware cause?
Adware displays advertisements promoting deceptive/malicious content capable of causing serious issues (e.g., system infections, financial losses, etc.). Furthermore, this software typically has data-tracking abilities - therefore, it is also deemed to be a privacy threat.
What does adware do?
Adware operates by running intrusive advertisement campaigns. To elaborate, this software's functionalities can include displaying ads on visited websites and/or different interfaces, force-opening sites, and collecting private data.
How do adware developers generate revenue?
Most of the profit comes from affiliate programs. Adware developers can earn commissions for promoting various websites, apps, products, services, and other content.
Will Combo Cleaner remove Multicheck Checkbox Checker adware?
Yes, Combo Cleaner will scan your system and eliminate detected adware-type applications. Keep in mind that manual removal (unaided by security programs) might not be an ideal solution. Sometimes, even after the adware has been manually removed - various files remain hidden within the system. What is more, the remaining components can continue running and causing issues. Therefore, it is paramount to eliminate adware thoroughly.
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