Severity scale:  
  (10/100)

Weknow.ac. How to remove? (Uninstall guide)

removal by Ugnius Kiguolis - - | Type: Browser hijacker

Weknow.ac – a browser-hijacking app which collects browsing activity-related information

weknow.ac hijack
weknow.ac is a browser hijacker which collects browsing-activity related details to use it for marketing purposes.

Weknow.ac is a fake web search engine created by weknow – an Israeli-based developer. Similarly to chumsearch.com, this application is considered to be a browser hijacker,[1] as it changes the homepage and new tab address of Google Chrome, Mozilla Firefox or Safari without a warning. The dubious app is capable of showing sponsored links, redirecting all search queries to WebCrawler, displaying intrusive ads in various forms and also gathering browsing activity-related data and using it to bring revenue for the program owners. 

Name weknow.ac
Type Browser hijacker
Danger level Low. Does harm only to specific browsers.
Browsers affected Chrome, Firefox, Safari
Details gathered Bookmarks, IP addresses, various search requests, etc.
To avoid Stay away from dubious sites, do not use secondary installers, download and install an antivirus.
Spreads by Bundles, malicious links, and pages, etc.
Deletion process Use Reimage to get rid of the PUP.

Unlike most other browser hijackers, this one only affects Mac OS users, although it does not mean that developers will not create a version compatible with Windows-based systems. Browser-hijacking applications such as weknow.ac come with the bundled software, injected from various visited websites, or sometimes can be downloaded from the official page. However, software bundling is the most prominent PUP[2] distribution method.

To create revenue, developers of Weknow.ac virus employ various tracking technologies, such as beacons, tracking cookies, JavaScript, and similar. With the help of these tools, various non-personal details are transferred to app's authors. The information contains:

  • Bookmarks;
  • Search queries;
  • Websites viewed and the length of the visit;
  • Links clicked;
  • IP address;
  • Internet service provider (ISP), etc.

In order to avoid such data leakage perform Weknow.ac removal by manually eliminating the threat or using professional security software. We suggest using Reimage, although you can use any other anti-malware software of your liking.

Furthermore, in some situations, you might face identity theft or stolen money from your bank account. So, it is essential to keep your personal information safe and not to disclose it inside third-party websites weknow.ac could redirect you to. from questionable websites. 

Additionally, Weknow.ac hijack can result in numerous redirects to suspicious websites. This kind of pages may even contain harmful components (such as keyloggers, ransomware, crypto-miner or trojan horses). In some cases, you might end up infecting your machine with these malicious programs and harming system files, which can result in personal data loss. 

All in all, we recommend you remove Weknow.ac fro your computer as soon as possible. The annoying ads, system slowdowns, and even potential information leakage is something you could experience on a daily basis. Thus, you are better off without the unwanted application on your PC.

Browser hijacker infiltration techniques and ways to avoid it

According to tech professionals[3], PUPs spread bundled in freeware or shareware packages. These free applications obtain online can contain optional components that could be removed before the installation is complete. Unfortunately, developers often fail to disclose the information how to do so, and deceptively ask users to use Recommended or Quick installation modes.

In order to avoid browser hijacker infections, follow these guidelines:

  • When installing free software, always opt for Advanced or Custom installation settings. Then, remove all the optional components before the installation of the desired application is finalized;
  • Avoid browsing questionable websites, as well as file-sharing domains;
  • Download and install an antivirus program on your computer. If kept up-to-date it can detect even the most recent threats;
  • Finally, be attentive and do not trust everything that is suggested to you on the internet.

Eliminate the Weknow.ac fake search engine quickly

To remove Weknow.ac manually, you should eliminate all browser extensions and questionable applications that you do not recognize. For that, follow our step-by-step guide below this article. Make sure that execute each step with great caution. If you make mistakes, Weknow.ac virus might return.

If you want a fast we.know.ac virus removal, consider downloading and installing an anti-malware program. Pick one of the programs mentioned below, download it and bring it up to date. These tools will get rid of the cyber threat within a couple of minutes. 

You can remove weknow.ac automatically with a help of one of these programs: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus, Malwarebytes Anti Malware. We recommend these applications because they can easily delete potentially unwanted programs and viruses with all their files and registry entries that are related to them.

We might be affiliated with any product we recommend on the site. Full disclosure in our Agreement of Use. By Downloading any provided Anti-spyware software to remove weknow.ac you agree to our privacy policy and agreement of use.
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Compatible with Microsoft Windows Compatible with OS X
What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall weknow.ac. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
More information about this program can be found in Reimage review.
Press mentions on Reimage

To remove weknow.ac, follow these steps:

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase weknow.ac from Windows systems

  1. Click Start Control Panel Programs and Features (if you are Windows XP user, click on Add/Remove Programs).Click 'Start -> Control Panel -> Programs and Features' (if you are 'Windows XP' user, click on 'Add/Remove Programs').
  2. If you are Windows 10 / Windows 8 user, then right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel and Uninstall a Program. If you are 'Windows 10 / Windows 8' user, then right-click in the lower left corner of the screen. Once 'Quick Access Menu' shows up, select 'Control Panel' and 'Uninstall a Program'.
  3. Uninstall weknow.ac and related programs
    Here, look for weknow.ac or any other recently installed suspicious programs.
  4. Uninstall them and click OK to save these changes. Right click on each of suspicious entries and select 'Uninstall'
  5. Remove weknow.ac from Windows shortcuts
    Right click on the shortcut of Mozilla Firefox and select Properties. Right click on browsers' icon and select 'Properties'
  6. Go to Shortcut tab and look at the Target field. Delete malicious URL that is related to your virus. Select 'Shortcut' tab and delete 'http://isearch.babylon.com...' or other suspicious URL

Repeat steps that are given above with all browsers' shortcuts, including Internet Explorer and Google Chrome. Make sure you check all locations of these shortcuts, including Desktop, Start Menu and taskbar.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Delete weknow.ac from Mac OS X system

If you got a browser hijacker infection on your Mac operating system, follow these guidelines in order to get rid of it:

  1. If you are using OS X, click Go button at the top left of the screen and select Applications. Cick 'Go' and select 'Applications'
  2. Wait until you see Applications folder and look for weknow.ac or any other suspicious programs on it. Now right click on every of such entries and select Move to Trash. Click on every malicious entry and select 'Move to Trash'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Remove weknow.ac from Internet Explorer (IE)

  1. Remove dangerous add-ons
    Open Internet Explorer, click on the Gear icon (IE menu) on the top right corner of the browser and choose Manage Add-ons. Click on menu icon and select 'Manage add-ons'
  2. You will see a Manage Add-ons window. Here, look for weknow.ac and other suspicious plugins. Disable these entries by clicking Disable: Right click on each of malicious entries and select 'Disable'
  3. Change your homepage if it was altered by virus:
    Click on the gear icon (menu) on the top right corner of the browser and select Internet Options. Stay in General tab.
  4. Here, remove malicious URL and enter preferable domain name. Click Apply to save changes. Delete malicious URL, enter your desired domain name and click 'Apply' to save changes
  5. Reset Internet Explorer
    Click on the gear icon (menu) again and select Internet options. Go to Advanced tab.
  6. Here, select Reset.
  7. When in the new window, check Delete personal settings and select Reset again to complete weknow.ac removal. Go to 'Advanced' tab and click on 'Reset' button. Now select 'Delete personal settings' and click on 'Reset' button again
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Eliminate weknow.ac from Microsoft Edge

Reset Microsoft Edge settings (Method 1):

  1. Launch Microsoft Edge app and click More (three dots at the top right corner of the screen).
  2. Click Settings to open more options.
  3. Once Settings window shows up, click Choose what to clear button under Clear browsing data option. Go to Settings and select 'Choose what to clear'
  4. Here, select all what you want to remove and click Clear. Select 'Clear' button
  5. Now you should right-click on the Start button (Windows logo). Here, select Task Manager. Open the start menu and select 'Task Manager'
  6. When in Processes tab, search for Microsoft Edge.
  7. Right-click on it and choose Go to details option. If can’t see Go to details option, click More details and repeat previous steps. Right-click 'Microsoft Edge' and select 'Go to details' Select 'More details' if 'Go to details' option fails to show up
  8. When Details tab shows up, find every entry with Microsoft Edge name in it. Right click on each of them and select End Task to end these entries. Find Microsoft Edge entries and select 'End Task'

Resetting Microsoft Edge browser (Method 2):

If Method 1 failed to help you, you need to use an advanced Edge reset method.

  1. Note: you need to backup your data before using this method.
  2. Find this folder on your computer: C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  3. Select every entry which is saved on it and right click with your mouse. Then Delete option. Go to Microsoft Edge folder on your computer, right-click every entry and click 'Delete'
  4. Click the Start button (Windows logo) and type in window power in Search my stuff line.
  5. Right-click the Windows PowerShell entry and choose Run as administrator. Find Windows PowerShell, right-click it and select 'Run as administrator'
  6. Once Administrator: Windows PowerShell window shows up, paste this command line after PS C:\WINDOWS\system32> and press Enter:
    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register $($_.InstallLocation)\AppXManifest.xml -Verbose}
    Copy and paste a required command and press 'Enter'

Once these steps are finished, weknow.ac should be removed from your Microsoft Edge browser.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of weknow.ac from Mozilla Firefox (FF)

If weknow.ac is doing malicious activity on your Mozilla Firefox browser, consider removing it by following this guidance:

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select weknow.ac and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Change your homepage if it was altered by virus:
    Click on the menu (top right corner), choose Options General.
  4. Here, delete malicious URL and enter preferable website or click Restore to default.
  5. Click OK to save these changes. When in 'General' tab, delete malicious URL from 'Home Page' section or click on 'Restore to Default' button. Click 'OK' to save changes
  6. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  7. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete weknow.ac removal. Click on 'Reset Firefox' button for a couple of times
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Uninstall weknow.ac from Google Chrome

Remove the PUP from Google Chrome by looking through these instructions:

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select weknow.ac and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Change your homepage and default search engine if it was altered by your virus
    Click on menu icon and choose Settings.
  4. Here, look for the Open a specific page or set of pages under On startup option and click on Set pages. After clicking on menu and 'Settings', select 'Set pages'
  5. Now you should see another window. Here, delete malicious search sites and enter the one that you want to use as your homepage. Click 'X' to remove malicious URLs
  6. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  7. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  8. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  9. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  10. Click Reset to confirm this action and complete weknow.ac removal. Click on 'Reset' button to complete your removal
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase weknow.ac from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for weknow.ac or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Change your homepage if it was altered by virus:
    Open your Safari web browser and click on Safari in menu section. Here, select Preferences as it was displayed previously and select General.
  4. Here, look at the Homepage field. If it was altered by weknow.ac, remove unwanted link and enter the one that you want to use for your searches. Remember to include the "http://" before typing in the address of the page. When in 'General', delete malicious URL and enter your desired domain name
  5. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  6. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete weknow.ac removal process. Select all options and click on 'Reset' button

About the author

Ugnius Kiguolis
Ugnius Kiguolis - The mastermind

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