Contenko is the search engine that changes settings on internet browsers and the search provider to promote related material

All those redirects caused by Contenko virus are designed to achieve the goal of rerouting online traffic and exposing the user to needed commercial material. This is technically not a virus, only a potentially unwanted program or a browser threat, but intrusive behavior makes people frustrated and annoyed so they call the PUP a virus. This browser hijacker interferes with users' experience and shows tons of ad-supported sites instead of providing proper results, so there is nothing valuable that this hijack provides and you can remove it from the machine.
| Name | Contenko/ Contenko.com |
|---|---|
| Type | Browser hijacker |
| Symptoms | After the infiltration, this hijacker changes settings on the browser and sets the default search engine to Contenko.com, alters new tab and homepage preferences. This search engine shows results injected with sponsored content and redirects you to various commercial pages this way |
| Distribution | Freeware installations, other PUPs, deceptive pages, and promotional content |
| Potential danger | Potentially unwanted programs can track and collect users browsing habits and information regarding the time online. This is the behavior that may result in privacy issues. The content that you get unwillingly exposed to also can lead to malware infiltrations |
| Elimination | You need an automatic tool for Contenko removal. Anti-malware tools can help with the process of cleaning the device |
| System care | Run FortectIntego after the proper threat removal, so you can improve the performance |
Contenko browser hijacker is nothing put a redirects-based program that focuses on monetization. The PUP exhibits malicious traits and can interfere with the performance, even more, when it installs other PUPs without permission or alters system settings. Experts[2] note that you need to take this into consideration and get rid of the hijacker as soon as possible because it can change registry and startup preferences.
Contenko is not providing any useful in-browser search results once it alters the default settings and even installs toolbars or extensions on Google Chrome, Internet Explorer, Mozilla Firefox, Safari, or any other browsers. It modifies custom settings and affects the load time threshold, places lock files on Firefox and prevents other software from altering those settings.
Contenko.com can even disable some features and functions to allow different installations. All the deceptive sites that you get exposed to can be set to promote ofter software and trigger automatic downloads of plugins, browser extensions, toolbars.
To remove Contenko.com completely and forget about the redirects, pop-ups, you need a thorough system scan. Since this is the program that came via freeware installations, you cannot be sure that other PUPs haven't got installed during the same infiltration. So anti-malware tools like SpyHunterCombo Cleaner or MalwarebytesMalwarebytes can detect and remove them all during an automatic scan on the computer. 
Contenko is a potentially unwanted program, which may cause various issues for PC users. In most of the cases, they report about the unwanted discovery of this website instead of their homepage and default search engine or commercial pop-up ads that show up every time they start their browsing.
While it may seem that your homepage was replaced by a normal search site, we can't guarantee that you will receive trustworthy search results. In most cases, Contenko.com returns altered search results that promote related websites or show paid ads in the first place.
That's why we always recommend relying only on such reputable search engines as Google, Yahoo, or Bing. Besides, you should remove Contenko from your machine if you want to stop the previously mentioned activities. Do not forget about pieces that PUP affects directly like registry, system folders. You need to repair the damage there too. Get the FortectIntego or a similar tool for that and clean the system fully.
Browser hijackers and adware infiltrate the system via other PUPs and deceptive sites
You may discover suspicious search engines or different browser programs on your computer after installing freeware or shareware, such as various PDF creators, download managers, video converters, and similar software. In order to avoid that, you have to monitor the installation process of such programs every time you download anything from the internet.
If you fail to do that, you may also discover this unfair search engine on your PC one day. Once it enters a computer, the rogue program occupies all Internet browsers and starts its annoying routine. Once again, we can't call this program a virus because it doesn't harm computers. However, you shouldn't trust this search results because it seeks the only thing – collect sales.[3]
You can avoid the infiltration of PUP by choosing professional anti-malware tools that can run on the machine and block potential threats, go for official software providers for your programs and tools. Also, the best solution is to go for Advanced or Custom installation options every time you get freeware, so you can deselect extra offers and see all the additional programs included on the setup.
The elimination process involves manual and automatic Contenko removal steps
If you noticed redirections to Contenko.com, it means that the Contenko virus is inside your computer. When the intruder runs on the machine it exposes you to possibly dangerous content and can lead to installations of other PUPs or even more dangerous malware.
You need to get rid of all the potential threats, files associated with this browser hijacker, or any other potentially unwanted program. Contenko removal requires additional steps for terminating intruders on each browser directly, so rely on the guide below.
To completely remove Contenko from the system, you should rely on scanning the machine using a professional anti-malware tool that is capable of detecting, indicating, and removing all the potential threats, corrupted files, or even malicious programs. Such a program cleans the machine further and helps to eliminate all virus damage by repairing certain system files.
Uninstall from Windows
Uninstall from Windows 10/8:
- Type Control Panel into the Windows search box and open the result.
- Under Programs, select Uninstall a program.

Uninstall from Windows 7/XP:
- Click on Windows Start > Control Panel (Windows XP users should click on Add/Remove Programs).
- In Control Panel, select Programs > Uninstall a program.

Remove the unwanted program:
- In the Programs and Features window, look for any recently installed suspicious entries, select them, and click Uninstall.
- If User Account Control appears, click Yes to confirm, then complete the removal.

Delete from macOS
Remove the unwanted application:
- From the menu bar, select Go > Applications.
- In the Applications folder, look for any suspicious entries, then drag them to Trash (or right-click and pick Move to Trash).

Delete leftover files and folders:
- Select Go > Go to Folder.
- Enter /Library/Application Support and remove any suspicious folders related to the unwanted program.
- Repeat the same check in the /Library/LaunchAgents and /Library/LaunchDaemons folders, deleting any suspicious entries.

- Finally, empty the Trash to permanently remove the leftovers.
Remove from Microsoft Edge
Delete unwanted extensions from MS Edge:
- Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
- From the list, pick the extension and click on the Gear icon.
- Click Remove.

Clear cookies and other browser data:
- Click on the Menu (three horizontal dots at the top-right of the browser window) and select Settings > Privacy, search, and services..
- Under Clear browsing data, pick Choose what to clear.
- Select Cookies and other site data and Cached images and files. (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.

Restore new tab and homepage settings:
- Click the menu icon and choose Settings.
- Then find On startup section.
- Click Remove next to any suspicious startup page.
Reset MS Edge if the above steps did not work:
- Press on Ctrl + Shift + Esc to open Task Manager.
- Click on More details arrow at the bottom of the window.
- Select Details tab.
- Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.

Instructions for Chromium-based Edge
Delete extensions from MS Edge (Chromium):
- Open Edge and click select Settings > Extensions.
- Delete unwanted extensions by clicking Remove.

Clear cache and site data:
- Click on Menu and go to Settings.
- Select Privacy, search and services.
- Under Clear browsing data, pick Choose what to clear.
- Under Time range, pick All time.
- Select Clear now.

Reset Chromium-based MS Edge:
- Click on Menu and select Settings.
- On the left side, pick Reset settings.
- Select Restore settings to their default values.
- Confirm with Reset.
- This will disable extensions and reset startup pages but will not delete bookmarks, saved passwords, or browsing history.

Remove from Mozilla Firefox (FF)
Remove dangerous extensions:
- Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
- Select Add-ons.
- In here, select the unwanted extension and click Remove.

Reset the homepage:
- Click three horizontal lines at the top right corner to open the menu.
- Choose Settings.
- Under Home, set your preferred homepage and new tab settings.
Clear cookies and site data:
- Click Menu and pick Settings.
- Go to Privacy & Security section.
- Scroll down to locate Cookies and Site Data.
- Click on Clear Data...
- Select Cookies and Site Data and Temporary cached files and pages, then click Clear.

Reset Mozilla Firefox
If clearing the browser as explained above did not help, reset Mozilla Firefox:
- Open Mozilla Firefox browser and click the Menu.
- Go to Help and then choose Troubleshooting Information.

- Under Give Firefox a tune up section, click on Refresh Firefox...
- Once the pop-up shows up, confirm the action by pressing on Refresh Firefox.

Remove from Google Chrome
Delete malicious extensions from Google Chrome:
- Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
- In the newly opened window, you will see all the installed extensions. Uninstall all suspicious extensions related to the unwanted program by clicking Remove.

Clear cache and web data from Chrome:
- Click on Menu and pick Settings.
- Under Privacy and security, select Clear browsing data.
- Select Browsing history, Cookies and other site data, as well as Cached images and files.
- Click Clear data.

Change your homepage:
- Click menu and choose Settings.
- Look for a suspicious site in the On startup section.
- Click on Open a specific or set of pages and click on three dots to find the Remove option.
Reset Google Chrome:
If the previous methods did not help you, reset Google Chrome to eliminate all the unwanted components:
- Click on Menu and select Settings.
- In the Settings, scroll down and click Advanced.
- Scroll down and locate Reset and clean up section.
- Now click Restore settings to their original defaults.
- Confirm with Reset settings.

Delete from Safari
Remove dangerous extensions:
- Open Safari, click Safari in the menu at the top-left of the screen, and select Preferences.
- Go to the Extensions tab, look for any suspicious entries, and click Uninstall to remove them.

Clear history and website data:
- Click Safari in the menu and pick Clear History.
- Set Clear to all history and confirm with Clear History.

Reset Safari:
- Click Safari in the menu and select Preferences > Advanced.
- Enable Show Develop menu in menu bar.
- From the menu bar, click Develop and select Empty Caches.

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