How to remove Zoco PDF Viewer from a web browser
Written by Tomas Meskauskas on
What kind of application is Zoco PDF Viewer?
During our evaluation of the Zoco PDF Viewer application/browser extension, we observed that it exhibits intrusive advertisements, leading us to classify it as adware. Further analysis revealed that Zoco PDF Viewer has the ability to read and modify all data on any website. Our team discovered Zoco PDF Viewer on a deceptive site.
Zoco PDF Viewer in detail
Zoco PDF Viewer is described as an app allowing users to display PDF files in the browser with PDF.js and send PDFs to any PDF viewer. However, this application displays unwanted advertisements. It is worth noting that advertisements generated by ad-supported apps, particularly those that are promoted through deceitful websites, may lead to shady webpages.
Clicking on ads shown by Zoco PDF Viewer may lead to phishing websites that aim to steal personal information, tech support scam websites that claim a computer is infected with malware, malicious websites that distribute malware, adult websites that may contain inappropriate content, fake shopping websites, etc.
Also, clicking those ads may cause unexpected downloads and installations. Thus, it is strongly recommended not to trust the Zoco PDF Viewer app.
| Name | Ads by Zoco PDF Viewer |
| Threat Type | Adware |
| Symptoms | Your computer becomes slower than normal, you see unwanted pop-up ads, you are redirected to dubious websites. |
| Distribution methods | Deceptive pop-up ads, free software installers (bundling), torrent file downloads. |
| Damage | Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites, loss of private information. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
More about adware
Adware is designed to serve unwanted advertisements to users, and some adware programs can also modify browser settings without the user's consent. For example, an adware program may change the browser's homepage or search engine to a different one that shows more ads or redirects the user to unwanted websites.
Also, adware can be designed to track the user's browsing behavior. More examples of advertising-supported apps are Buzz, MetAI assistant, and Simple Ad Blocker.
How did adware install on my computer?
Users can inadvertently install adware on their devices by downloading and installing software bundles that contain adware programs. Adware can also be installed through deceptive download links that claim to offer legitimate software or updates.
Additionally, fake software update notifications can trick users into installing adware disguised as legitimate software updates.
How to avoid installation of unwanted applications?
Download applications and files only from official and reputable sources. Avoid using P2P networks, free file hosting sits, shady pages, etc. When installing software, carefully review the options and deselect any unwanted apps. Avoid clicking on ads and notifications from suspicious websites. Read reviews before downloading applications.
If your computer is already infected with rogue applications, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate them.
Shady website promoting Zoco PDF Viewer application:
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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By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.
Quick menu:
- What is Zoco PDF Viewer?
- STEP 1. Uninstall adware applications using Control Panel.
- STEP 2. Remove rogue plug-ins from Google Chrome.
- STEP 3. Remove adware-type extensions from Mozilla Firefox.
- STEP 4. Remove malicious extensions from Safari.
- STEP 5. Remove rogue plug-ins from Microsoft Edge.
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 any unwanted applications, select these entries and click "Uninstall" or "Remove".
After uninstalling the unwanted application, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Remove adware from Internet browsers:
Video showing how to remove 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 "Zoco PDF Viewer" and other suspicious extensions, select these entries and click "Remove".
Optional method:
If you continue to have problems with removal of the ads by zoco pdf viewer, 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 plug-ins 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 all recently-installed suspicious extensions, click on the three dots and then click "Remove".
Optional method:
Computer users who have problems with ads by zoco pdf viewer 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 zoco pdf viewer, 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?
The presence of adware on your computer can result in a subpar browsing experience and may even cause a reduction in your system's overall performance.
What does adware do?
Adware is short for advertising-supported software, which exists for the purpose of inundating users with intrusive advertisements.
How do adware developers generate revenue?
Adware developers commonly earn money by endorsing different products, websites, or services, with a majority of their profits coming from affiliate programs.
Will Combo Cleaner remove Zoco PDF Viewer adware?
Combo Cleaner is capable of scanning your computer and removing all adware-type applications that are installed. However, it is important to remember that manual removal may not always be effective, as some file remnants may remain hidden within the system. Even if the primary adware software is deleted, certain components may still be present and operational.
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