Viewndow Virus

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Trojans like Viewndow are the most dreaded kind of malicious software. Even if you’re completely unfamiliar with computers and can’t think of any other viruses by name, the word “Trojan” is sure to strike a bell, and not only because of the classic legend.

Viewndow 1
Viewndow is tricky, it autoruns and can do a number of things

There is a solid reason why Trojans are so well-known. Consider that Trojans are responsible for 75%+ of all malware infections. A Trojan known as Viewndow is one of the most recent representatives of this malware family, and it has been infecting an increasing number of people. That’s why we wrote this post: to warn people about this danger. If you have discovered Viewndow or Weather Zero residing in your system, you may want to learn more about the possible activities of this malicious program. You may also want to learn how to remove the virus on your own by following the removal instructions at the end of this article.

What exactly do Trojans do?

Trojans like Viewndow are unusually flexible when it comes to causing harm, which sets them apart from the bulk of other malware types. That’s why they’re preferred by most malicious actors on the internet. Depending on what the hackers who put Viewndow on your computer want to achieve, malware like this can do a number of things.

For example, Trojans like this one may easily erase certain files from your computer, or they can format all of your disks and drives, destroying everything that you store on them. It’s not hard to understand that, after such a data-destroying attack, your computer may become completely unusable.

Theft is another thing Trojans like Viewndow are frequently used for. The virus may use a variety of techniques to obtain private information, such as financial data, or health status, professional details, and other company data that could be of interest to the criminals who are in control of the infection. For instance, Viewndow may use a technique known as keystroke logging to record every keyboard key you hit. In this way, the malware may let criminals get their hands on your login information and access your social media, banking, and other accounts. Other, more complex methods of data theft, such as rerouting all of your traffic to the hackers’ servers, may give them control over everything you do online.

Spying on victims is another terrifying use of Trojans. All of the above methods of data theft can be used to spy on you in combination with accessing your camera and microphone and watching everything you do on your screen.

Your compromised computer might also be exploited as part of a botnet, potentially infecting other machines in its network and distributing spam. As a matter of fact, Trojans may frequently be used to introduce additional malware and viruses to the victim’s machine, most typically ransomware. Aside from that, the attackers could use the processing power of your computer to mine cryptocurrency for themselves.

As you can see, the things Viewndow may be up to on your computer are so diversified that there should be no question that its removal should be a priority. Our Viewndow removal guide can show you the steps to remove the infection, but if you’d rather put your trust in a tested removal program, we have that, too.

After you’ve removed the Trojan, you should pay more attention to system security and take every precaution possible to avoid other attacks in the future. You may accomplish this by avoiding all the possible sources of Trojan horse infections, such as spam emails and compromised websites. If you have to download something from the internet use only trusted download sites since torrents and other downloadable files may potentially surprise you with a concealed danger. You should also try to limit your interaction with internet advertisements, since, among them, there are often malvertisements used to spread viruses and other forms of malware.

If you still need help after reading the article, you can leave a comment below or download the antivirus software we recommend.


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How to uninstall the Viewndow virus?

Victims of Viewndow need to deal with the Trojan Horse as soon as they detect that they have been infected. One of the quickest actions they can take is to check their computer for malicious programs and remove those programs from the system with the help of the following instructions:

  1. From the Start Menu, navigate to Control Panel >>>> Programs and Features >>>> Uninstall a Program.
  2. Next, filter the programs that have been listed there by date of installation and search for Viewndow or programs that generally look bogus and have a non-reputed developer.
  3. If needed, research the programs that look questionable online in order to decide if they represent a danger or not.
  4. Uninstall Viewndow and any other program that you don’t use and doesn’t look legitimate by selecting it and clicking on the Uninstall button at the top of the screen.

Advanced Trojan Horse infections like Viewndow can hide in various system locations and add malicious files to the system without your knowledge. Therefore, note that the instructions above may not be enough to fully rid you of the malware. For more detailed removal instructions, please follow the Viewndow removal guide below.


If you don’t want to lose this page with removal instructions and are planning to complete the guide till the end, please make sure that you bookmark it in your browser before you do anything else.

Next, we recommend that you reboot the compromised computer in Safe Mode in order to run only the most essential processes and limit the malicious activity of Viewndow to some extent.

After that, when the system reboots, click on the Start menu button and type msconfig in the search field. Open the result and click on the Startup tab:


There you will see a list of startup items. The ones with a checkmark are set to start when the computer starts. Carefully check them and if you detect Viewndow or another entry that looks suspicious, and you believe it is malicious, remove its checkmark to disable it.



In the second step, you need to start the Task Manager and check what processes are currently running on the computer. To do that, press CTRL, SHIFT and ESC together and click on the Processes Tab. Next, filter the processes by CPU and Memory usage, and look at their names. If you detect a process that doesn’t look legitimate, has an odd name or uses a lot of resources, it is a good idea to check its files for malicious code by right-clicking on it and selecting Open File Location.


Next, you can scan the related files with a trusted antimalware software, or you can simply drag and drop them in the powerful free online virus scanner below:

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    If any of the scanned files turns out to be related to the Trojan infection or gets flagged as a threat, immediately end the process and delete the dangerous file and its folders. 

    You can check any suspicious-looking process in the Task Manager in this way until you are sure there is nothing dangerous running on the computer.



    Next, use the Windows and R key combination to open a Run dialog box on the screen. In it, type appwiz.cpl and click OK.



    In the new window that opens, search the list of programs for bogus apps or any recently installed pieces of software that might be linked to Viewndow. If you believe that a particular program is dangerous,  or you can’t remember installing it, then it is a good idea to uninstall it from the computer with a right-click.

    In case that a pop-up message like the one below asks you to confirm your action, when you click Uninstall, choose NO and complete the unisntallation process:




    To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

    If you want to avoid the risk, we recommend downloading SpyHunter
    a professional malware removal tool.

    More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

    Trojans like Viewndow may often allow malicious actors to access important system files and make unauthorized changes in them. In case of hacking, the Hosts file of the computer may have some malicious IP addresses added to it. To check if such changes have been made in your Hosts file, copy this notepad %windir%/system32/Drivers/etc/hosts in the search bar of the Start menu and click OK:

    Next, find Localhost in the text, and look for any suspicious-looking IP addresses like those on the image below:

    hosts_opt (1)


    If you see nothing unusual in your Hosts file, simply close it, but if you find some suspicious IPs below “Localhost“, please leave us a message with a copy of them in the comments.


    Finally, to ensure that Viewndow has been removed completely and there are no entries that can help it reinstall on the system, type Regedit in the windows search field and press Enter to open the Registry Editor. 

    Once the Editor screen opens, use CTRL and F key combination to open a Find box. Then, write the name of the Trojan in it and click on Find Next to search the registry for entries that are matching that name.  If anything is found in the results, you should not leave it in the registry, but carefully delete it. Then, repeat the search as many times as needed until you delete everything that is related to Viewndow.

    When you are done, use the left panel to manually navigate to the directories below: 

    • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
      HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
      HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

    Search each of them for files and folders that are named randomly or look suspicious, and if you believe they are linked to the Trojan infection, delete them as well.

    Please note that deletions and changes in the registry may have a serious impact on the normal operation of your OS. If the instructions from this guide aren’t helpful in your case, or you are not sure which files are malicious and need to be deleted, please consider using the professional removal tool recommended on this page. You can also scan any file that looks suspicious with our free online virus scanner. In case you have questions about any of the steps,  we would love to know about them in the comments below. 


    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.

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