DefendSearch virus – a browser hijacking program which can make browsing the web unbearable activity

DefendSearch is a browser hijacker which replaces your default homepage and search engine[1] to http://defendsearch.com/?q=. It seems to attack Google Chrome; however, some other versions of the virus can affect other browsers as well. This shady search engine spreads as Secure Chrome Pro browser extension. Sometimes, users call this program DefendSearch virus due to its sneaky distribution technique through other software and the ability to perform a big variety of intruding activities. Once installed, the browser-hijacking application might bring even damaging consequences to your computer as you might accidentally land on a malicious website during the redirecting activity the potentially unwanted program might cause.
| Name | DefendSearch |
|---|---|
| Category | Browser hijacker |
| Search engine | http://defendsearch.com/?q= |
| Extension | Secure Chrome Pro |
| Problems caused | Changed browser settings, Windows Registry modification, injection of rogue components, dubious redirecting, delivered adverts |
| Affected OS | Mac or Windows |
| Distribution | Bundles, third-party pages |
| Detection | Detect rogue software with FortectIntego |
The add-on promises to protect from cyber threats by delivering notifications if the website you entered is secure or not. However, after the installation or infiltration DefendSearch causes more problems than benefits users, such as:
- alteration to browser’s settings;
- modification to Windows Registry;[2]
- installation of unknown browser add-ons;
- redirects to third-party websites;[3]
- delivery of annoying ads.
The PUP might enter the system unnoticed. However, the first symptom of the DefendSearch hijack is clear – replaced homepage and default search engine to the new domain. If you do not get rid of these unwanted changes, you will be forced to use the new search engine which might show misleading search query results. Additionally, it can install browser helper objects that protect the hijacker and prevents from elimination.
However, Defendsearch.com removal is needed due to the shady activities. This search engine is highly suspicious. According to the research, the hijacker might trigger redirects to the questionable websites that might be harmful or misleading. These redirecting problems might occur when users click on a search result link or out of nowhere. The main issue is that users cannot control this activity and avoid visiting potentially dangerous websites. Thus, their computers and privacy can be easily compromised.

Additionally, so-called DefendSearch virus can display intrusive and misleading ads. Usually, they are based on user’s search queries, visited websites and similar browsing-related information. Unfortunately, the hijacker might be capable of tracking information and using it for advertising purposes. It goes without saying that you should not click them too. Such adverts often bring revenue from the cost-per-click technique.
Users are advised to protect their browsers and browsing activity[4] by uninstalling Secure Chrome Pro and other questionable components. The best way to remove DefendSearch.com virus is to scan the system with a reputable anti-malware program, such as FortectIntego. However, you can feel free to use any other reliable computer security software.
Additionally, you can also get rid of DefendSearch.com together with related components manually. Our team has prepared detailed instructions at the end of the article. Please follow them carefully in order to succeed and get back to secure browsing. Clean all infected web browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, Internet Explorer.

Hijackers do not ask for your permission to enter the system
When downloading freeware or shareware, you have to be careful in order not to install unwanted programs like browser-hijacking applications or similar PUPs. These entries are added as optional components and can enter the system unnoticed if a user relies on Quick/Recommended settings.
However, a security team from bedynet.ru[5] tell that the majority of users still rely on these settings and agree to install PUPs without realizing it. Thus, if you are used to these settings too, you should get rid of your bad habit and remember these tips:
- Always download freeware from the official download websites;
- Read EULA, Terms of Use, Privacy policy;
- Opt for Advanced/Custom installation settings;
- Unmark all pre-selected entries from additional third-party downloads.
For further protection, you should purchase reliable computer security software[6] which has a lot of protective features and functions. Make sure you keep the antivirus program always up-to-date and it will take care of your computer system properly. When you are browsing the web, you will feel safer as this program will block various threats from invading the PC.

Remove Defendsearch.com virus from the infected system entirely
Defendsearch.com removal requires investigating the system and eliminating all cyber threats that might be related to them. The instructions below will show you where to look up for virus-related entries, and how to eliminate it entirely.However, if they seem complicated or time-consuming, there’s another solution.
You can remove Defendsearch.com virus automatically with an updated anti-malware software. However, browser reset is still needed in order to get rid of tracking cookies and similar components. Open the web browsers that you often use and find all rogue components in their settings.
Make sure you get rid of each PUP-related object, otherwise, the Defendsearch.com hijack might renew all rogue activities. Bringing browsers back to their previous states is a necessary thing to do if you want to browse the web fastly and effectively again. Moreover, keep in mind all browser hijacker avoiding tips which might be helpful in the future.
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.
Reset Internet Explorer
Remove dangerous add-ons:
- Open Internet Explorer, click on the Gear icon (IE menu) on the top-right corner of the browser
- Pick Manage Add-ons.
- You will see a Manage Add-ons window. Here, look for suspicious plugins. Click on these entries and select Disable.

Change your homepage if it was altered:
- Open IE and click on the Gear icon.
- Select Internet Options.
- In the General tab, delete the Home page address and replace it by your preferred one (for example, Google.com).
- Click Apply and then select OK.

Delete temporary files:
- Press on the Gear icon and select Internet Options.
- Under Browsing history, click Delete...
- Select relevant fields and press Delete.

Reset Internet Explorer:
- Click on Gear icon > Internet options and select Advanced tab.
- Select Reset.
- In the new window, check Delete personal settings and select Reset.

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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