Abdoser Virus

*7-day Free Trial w/Credit card, no charge upfront or if you cancel up to 2 days before expiration; Subscription price varies per region w/ auto renewal unless you timely cancel; notification before you are billed; 30-day money-back guarantee; Read full terms and more information about free remover.


The Abdoser virus is a Browser Hijacker. The Abdoser virus may modify the browser’s homepage or the search engine and to install some new toolbars, buttons and page-redirect services to some predefined sponsored websites.

Chrome browser is redirected to Abdoser
Screenshot of the Abdoser virus

What is Abdoser?

Abdoser is a Browser Hijacker. Browser Hijacker is a term used to describe a special type of software which can take over any browser and start spamming it with aggressive advertising materials like banners, ads, pop-ups, page redirects to sponsored pages and promotional links of various kinds. Using a highly secure browser such as Chrome, Firefox, Internet Explorer or Safari is not a guarantee that you won’t get tons of ads and unwanted components if you happen to accidentally install a browser hijacker on your computer, because hijacker software is normally quite effective in overcoming the anti-hijacker features and introducing its ad-generating settings to any browser. Still, the hijacker-based applications are not really viruses and they cannot cause any significant damage to the system – they are not like Ransomware, Trojans or Spyware in terms of their potential to cause problems.

It is important to mention that the browser hijackers are generally legitimate advertising tools, which are commonly used by different online-based businesses, software developers and marketers to promote their products, services and websites on the users’ screen. A lot of these programs may contain some free features which people may like. However, in most of the cases, the aggressive ad-generation, browser changes and sponsored page-redirects tend to cause irritation and disturbance to the normal web surfing. In the removal guide below, you will find details about the effective uninstallation of one recently reported hijacker app called Abdoser. There have been quite a lot of complaints from a number of users regarding this new representative of the hijacker family and, in case that you also find its activity a bit too intrusive, feel free to use the steps shown there to safely remove it.

Not a real danger but still potentially unwanted

A hijacker such as Abdoser or iStart Search Bar is unlikely to initiate anything that can be regarded as malicious. Its characteristics are quite different than the characteristics of a real malware threat (such as a Trojan Horse, a Worm or a Ransomware cryptovirus infection). That’s why it is generally not fatal if you have it on your computer. However, this does not mean that you should trust everything that the hijacker may display on your screen. Such software may show you different links, pop-up messages and offers but you should be careful with the content that you interact with because one accidental click may expose you to real computer dangers. Not to mention that you may get misled into purchasing products or services with questionable quality and origins or into filling in your personal data on some hazardous pages. That’s why, it is not a good idea to keep a browser hijacker on the system and to let it redirect you to its sponsored links and have control over your browser. Instead, use the instructions in the removal guide above and uninstall Abdoser in order to remove its ads and changes once and for all.


TypeBrowser Hijacker
Detection Tool

anti-malware offerOFFER *Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

Remove Abdoser Virus

 To try and remove Abdoser quickly you can try this:

  1. Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
  2. Then click on the Extensions tab.
  3. Look for the Abdoser extension (as well as any other unfamiliar ones).
  4. Remove Abdoser by clicking on the Trash Bin icon next to its name.
  5. Confirm and get rid of Abdoser and any other suspicious items.

If this does not work as described please follow our more detailed Abdoser removal guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide.

Some of the steps may require you to exit the page. Bookmark it for later reference.
Next, Reboot in Safe Mode (use this guide if you don’t know how to do it).

Step1 Uninstall the Abdoser app and kill its processes

The first thing you must try to do is look for any sketchy installs on your computer and uninstall anything you think may come from Abdoser. After that, you’ll also need to get rid of any processes that may be related to the unwanted app by searching for them in the Task Manager.

Note that sometimes an app, especially a rogue one, may ask you to install something else or keep some of its data (such as settings files) on your PC – never agree to that when trying to delete a potentially rogue software. You need to make sure that everything is removed from your PC to get rid of the malware. Also, if you aren’t allowed to go through with the uninstallation, proceed with the guide, and try again after you’ve completed everything else.

  • Uninstalling the rogue app
  • Killing any rogue processes

Type Apps & Features in the Start Menu, open the first result, sort the list of apps by date, and look for suspicious recently installed entries.

Click on anything you think could be linked to Abdoser, then select uninstall, and follow the prompts to delete the app.

delete suspicious apps

Press Ctrl + Shift + Esc, click More Details (if it’s not already clicked), and look for suspicious entries that may be linked to Abdoser.

If you come across a questionable process, right-click it, click Open File Location, scan the files with the free online malware scanner shown below, and then delete anything that gets flagged as a threat.

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
Drag and Drop File Here To Scan
Drag and Drop File Here To Scan
Analyzing 0 s
Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
    This scanner is based on VirusTotal's API. By submitting data to it, you agree to their Terms of Service and Privacy Policy, and to the sharing of your sample submission with the security community. Please do not submit files with personal information if you do not want them to be shared.
    Delete Abdoser files and quit its processes.

    After that, if the rogue process is still visible in the Task Manager, right-click it again and select End Process.

    Step2 Undo Abdoser changes made to different system settings

    It’s possible that Abdoser has affected various parts of your system, making changes to their settings. This can enable the malware to stay on the computer or automatically reinstall itself after you’ve seemingly deleted it. Therefore, you need to check the following elements by going to the Start Menu, searching for specific system elements that may have been affected, and pressing Enter to open them and see if anything has been changed there without your approval. Then you must undo any unwanted changes made to these settings in the way shown below:

    • DNS
    • Hosts
    • Startup
    • Task
    • Services
    • Registry

    Type in Start Menu: View network connections

    Right-click on your primary network, go to Properties, and do this:

    Undo DNS changes made by Abdoser

    Type in Start Menu: C:\Windows\System32\drivers\etc\hosts

    Delete Abdoser IPs from Hosts

    Type in the Start Menu: Startup apps

    Disable Abdoser startup apps

    Type in the Start Menu: Task Scheduler

    Delete Abdoser scheduled tasks

    Type in the Start Menu: Services

    Disable Abdoser services

    Type in the Start Menu: Registry Editor

    Press Ctrl + F to open the search window

    Clear the Registry from Abdoser items

    Step3 Remove Abdoser from your browsers

    • Delete Abdoser from Chrome
    • Delete Abdoser from Firefox
    • Delete Abdoser from Edge
    1. Go to the Chrome menu > More tools > Extensions, and toggle off and Remove any unwanted extensions.
    2. Next, in the Chrome Menu, go to Settings > Privacy and security > Clear browsing data > Advanced. Tick everything except Passwords and click OK.
    3. Go to Privacy & Security > Site Settings > Notifications and delete any suspicious sites that are allowed to send you notifications. Do the same in Site Settings > Pop-ups and redirects.
    4. Go to Appearance and if there’s a suspicious URL in the Custom web address field, delete it.
    1. irefox menu, go to Add-ons and themes > Extensions, toggle off any questionable extensions, click their three-dots menu, and click Remove.
    2. Open Settings from the Firefox menu, go to Privacy & Security > Clear Data, and click Clear.
    3. Scroll down to Permissions, click Settings on each permission, and delete from it any questionable sites.
    4. Go to the Home tab, see if there’s a suspicious URL in the Homepage and new windows field, and delete it.
    1. Open the browser menu, go to Extensions, click Manage Extensions, and Disable and Remove any rogue items.
    2. From the browser menu, click Settings > Privacy, searches, and services > Choose what to clear, check all boxes except Passwords, and click Clear now.
    3. Go to the Cookies and site permissions tab, check each type of permission for permitted rogue sites, and delete them.
    4. Open the Start, home, and new tabs section, and if there’s a rogue URL under Home button, delete it.


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.


    Leave a Comment

    We are here to help! Use SpyHunter to remove malware in under 15 minutes.

    Not Your OS? Download for Windows® and Mac®.

    * See Free Trial offer details and alternative Free offer here.

    ** SpyHunter Pro receives additional removal definitions and manual fixes through its HelpDesk in cases where they are needed.

    Spyware Helpdesk 1