How to uninstall the Big Linker application
Written by Tomas Meskauskas on (updated)
What is Big Linker?
Browser hijackers are potentially unwanted applications (PUAs) used to promote fake search engines by changing the settings of web browsers. The Big Linker browser hijacker promotes keysearchs.com in this way and collects browsing histories. It might also access other data.
Apps such as Big Linker fall into the category of PUAs because most users download and install them unintentionally.
Typical browser hijackers change the default search engine, homepage, and new tab to the address of a fake search engine, so that users are forced to visit this site when they open a browser, new tab, or enter search queries into the URL bar. Despite this, research shows that Big Linker can promote keysearchs.com without changing the browser settings.
In cases when it leaves settings unchanged, Big Linker detects when users enter search queries, and then opens keysearchs.com. This site redirects them to bing.com via my-search.com and search-checker.com, or to google.com.
Whether keysearchs.com shows results generated by Bing or Google depends on users' geolocations. Fake search engines can also generate misleading results. They can promote dubious websites (include their addresses in search results) and serve advertisements.
To remove addresses such as keysearchs.com from the settings, users must first uninstall the browser hijacker that promotes it (in this case, Big Linker, but there are other browser hijackers that also promote this address).
Big Linker can read browsing histories, however, it might also read other browsing-related data such as IP addresses, geolocations, and could access sensitive details (e.g., passwords). Data collected by browser hijackers is misused for marketing purposes, sold to third parties (potentially cyber criminals) or monetized in other ways.
Therefore, users may become victims of identity theft, encounter privacy breaches, have problems with browsing safety, etc. In order to avoid issues that browser hijackers can cause, do not agree to download or install these apps while downloading/installing other programs.
| Name | Big Linker |
| Threat Type | Browser Hijacker, Redirect, Search Hijacker, Toolbar, Unwanted New Tab |
| Browser Extension(s) | Big Linker |
| Supposed Functionality | Improved browsing experience |
| Promoted URL | keysearchs.com |
| Detection Names (keysearchs.com) | Fortinet (Malware), Full List Of Detections (VirusTotal) |
| Affected Browser Settings | Homepage, new tab URL, default search engine |
| Symptoms | Manipulated Internet browser settings (homepage, default Internet search engine, new tab settings). Users are forced to visit the hijacker's website and search the Internet using their search engines. |
| Distribution methods | Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers. |
| Damage | Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
In summary, browser hijackers are designed only to promote fake search engines (and collect browsing data and other information). Most are advertised as apps that supposedly improve the browsing experience by generating accurate search results or having certain functionality. In fact, no browser hijacker should be installed on operating systems or web browsers.
More examples of apps that are categorized as browser hijackers are PDFSearchWeb, VideoSearchApp, and 4KSportSearchs.
How did Big Linker install on my computer?
People often download and install unwanted apps inadvertently via deceptive advertisements - they click ads that cause unwanted download/installations by executing certain scripts.
Unwanted downloads and installations also occur during download/installation of other programs. I.e., when PUAs are included into the set-ups as 'extra offers'. This PUA distribution method of PUAs is called "bundling".
Typically, offers to download and install these additional apps can be declined via "Custom", "Advanced" or other settings, or by unticking certain checkboxes within the set-ups. When users download and install programs without making these checks and changes, they often allow PUAs to infiltrate.
How to avoid installation of potentially unwanted applications
You are advised to research all software before download/installation. Use only official and verified download channels. Unofficial and free file-hosting websites, Peer-to-Peer sharing networks (BitTorrent, Gnutella, eMule), and other third party downloaders commonly offer harmful and bundled content, and are therefore untrusted and should be avoided.
When downloading/installing, read the terms, study all possible options, use the "Custom/Advanced" settings and opt-out of additional apps, tools, features, and so on.
Intrusive advertisements typically seem legitimate, however, they can redirect to dubious and malicious sites (e.g. gambling, pornography, adult-dating, and many others). If you encounter ads or redirects of this kind, inspect the system and remove all dubious applications and browser extensions/plug-ins immediately.
Installed programs must be activated and updated with tools or implemented functions that are provided by the official developers. No other third party, unofficial tools should be used.
Note that it is illegal to activate licensed software with ‘cracking’ tools. Files and programs should be downloaded from official websites and via direct download links. Avoid third party installers and the tools/sources mentioned above.
Do not open website links or files in irrelevant emails that are received from unknown, suspicious addresses. These bogus emails are often disguised as official and important. Regularly, scan your computer with reputable, up-to-date antivirus or anti-spyware software.
If your computer is already infected with Big Linker, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this browser hijacker.
keysearchs.com redirects to bing.com via my-search.com and search-checker.com (GIF):
keysearchs.com redirects to google.com (GIF):
Website promoting Big Linker browser hijacker:
Instant automatic malware removal:
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Quick menu:
- What is Big Linker?
- STEP 1. Uninstall Big Linker application using Control Panel.
- STEP 2. Remove Big Linker browser hijacker from Google Chrome.
- STEP 3. Remove keysearchs.com homepage and default search engine from Mozilla Firefox.
- STEP 4. Remove keysearchs.com redirect from Safari.
- STEP 5. Remove rogue plug-ins from Microsoft Edge.
- STEP 6. Remove keysearchs.com redirect from Internet Explorer.
Big Linker browser hijacker 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 recently installed suspicious applications (for example, "Big Linker"), select these entries and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted applications that cause browser redirects to the keysearchs.com website, scan your computer for any remaining unwanted components. To scan your computer, use recommended malware removal software.
Big Linker browser hijacker removal from Internet browsers:
Video showing how to remove browser redirects:
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 "Big Linker" and other recently-installed suspicious browser add-ons, and remove them.
Change your homepage:
Click the Chrome menu icon (at the top right corner of Google Chrome), select "Settings". In the "On startup" section, disable "Big Linker", look for a browser hijacker URL (hxxp://www.keysearchs.com) below the “Open a specific or set of pages” option. If present, click on the three vertical dots icon and select “Remove”.
Change your default search engine:
To change your default search engine in Google Chrome: Click the Chrome menu icon (at the top right corner of Google Chrome), select "Settings", in the "Search engine" section, click "Manage search engines...", in the opened list look for "keysearchs.com", when located click the three vertical dots near this URL and select "Remove from list".
Optional method:
If you continue to have problems with removal of the big linker redirect, 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". Click on "Extensions" and remove "Big Linker", as well as all other recently installed browser plug-ins.
Change your homepage:
To reset your homepage, click the Firefox menu (at the top right corner of the main window), then select "Options", in the opened window disable "Big Linker", remove hxxp://keysearchs.com and enter your preferred domain, which will open each time you start Mozilla Firefox.
Change your default search engine:
In the URL address bar, type about:config and press Enter.
Click "I'll be careful, I promise!".
In the search filter at the top, type: "extensionControlled"
Set both results to "false" by either double-clicking each entry or clicking the 
button.
Optional method:
Computer users who have problems with big linker redirect 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 and click Safari menu, then select Preferences...
In the preferences window select the Extensions tab. Look for any recently installed suspicious extensions and uninstall them.
In the preferences window select General tab and make sure that your homepage is set to a preferred URL, if its altered by a browser hijacker - change it.
In the preferences window select Search tab and make sure that your preferred Internet search engine is selected.
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 top right corner of Microsoft Edge), select "Extensions". Locate any recently-installed suspicious browser add-ons, and remove them.
Change your homepage and new tab settings:
Click the Edge menu icon (at the top right corner of Microsoft Edge), select "Settings". In the "On startup" section look for the name of the browser hijacker and click "Disable".
Change your default Internet search engine:
To change your default search engine in Microsoft Edge: Click the Edge menu icon (at the top right corner of Microsoft Edge), select "Privacy and services", scroll to bottom of the page and select "Address bar". In the "Search engines used in address bar" section look for the name of the unwanted Internet search engine, when located click the "Disable" button near it. Alternatively you can click on "Manage search engines", in the opened menu look for unwanted Internet search engine. Click on the puzzle icon 
near it and select "Disable".
Optional method:
If you continue to have problems with removal of the big linker redirect, 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.
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon 
(at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently installed suspicious extensions, select these entries and click "Remove".
Change your homepage:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Internet Options", in the opened window remove hxxp://keysearchs.com and enter your preferred domain, which will open each time you launch Internet Explorer. You can also enter about: blank to open a blank page when you start Internet Explorer.
Change your default search engine:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Manage Add-ons". In the opened window, select "Search Providers", set "Google", "Bing", or any other preferred search engine as your default and then remove "Big Linker".
Optional method:
If you continue to have problems with removal of the big linker redirect, reset your Internet Explorer settings to default.
Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.
Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Summary:
A browser hijacker is a type of adware infection that modifies Internet browser settings by assigning the homepage and default Internet search engine settings to some other (unwanted) website URL. Commonly, this type of adware infiltrates operating systems through free software downloads. If your download is managed by a download client, ensure that you decline offers to install advertised toolbars or applications that seek to change your homepage and default Internet search engine settings.
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