Poisism.com is a software application that belongs to the category of so-called browser hijackers. Hijackers like Poisism.com earn their name from the fact that they can take over users’ browsing programs and alter their behavior.
There are always a lot of misconceptions, questions and concerns around browser hijackers such as Poisism.com because these pieces of software oftentimes tend to operate in a quite intrusive way. For instance, they may impose browser modifications such as homepage or search engine replacements in your main browser as well as initiate page redirects to different sites full of ads, banners, clickbait messages, pop-ups and other commercials that may not be welcomed by the end users.
Typically, such obscure apps like Wave browser, Brainy Choose Captcha affect the more commonly used browsers – browsing programs the likes of Chrome, Firefox, Explorer and Safari are the ones that get the most hijackers.
A browser hijacker can also be quite difficult to remove and every time you start a new browsing session, you are likely to become exposed to different sponsored pages, colorful adverts, sales messages and similar promotional materials, regardless of your attempts to close them down. Many web users mistake these activities for symptoms of a possible malware infection and fear browser hijackers like Poisism.com as much as they fear ransomware, Trojans, spyware and other nasty computer viruses.
And we cannot blame those who mistake such pieces of software for something alarming because, in most of the cases, the way browser hijackers operate can be rather aggressive and intrusive. Besides, it may take more than a couple of clicks to effectively uninstall them.
How invasive can a hijacker be?
It is not uncommon for software pieces like Poisism.com to integrate some new and unfamiliar components such as homepage domains, sponsored search engine tools, new new-tab pages, buttons, toolbars and shortcuts with the main browser without asking for the users’ permission. Not to mention that they may fill the entire screen with various blinking boxes and colorful messages that constantly prompt you to click on them just so that you can be sent to different ad-oriented web locations. With this in mind, it is not a surprise that the word “virus” is oftentimes used to refer to apps that are actually hijackers.
Fortunately, the aim of most browser hijackers isn’t to cause harm. They are tools of the online marketing industry which are only interested in promoting certain links, websites, products and services and are not related to criminal activities such as data theft, espionage, system corruption, file destruction or other nasty illegal deeds.
Nevertheless, it is still not a good idea to allow Poisism.com to linger on your PC for long. Over time, such pieces of software may cause irritating issues in your browser and prevent you from browsing the web in peace. In fact, the activity of any browser hijacker can adversely affect the performance of your PC as a whole. Sooner or later, the constant generation of advertisements (which uses up your system resources), would slow down the entire system and may even begin to cause software failure.
Another, much more significant reason why we consider the presence of such annoying apps undesirable, however, is the possibility of infection with really dangerous programs such as Trojans, ransomware and more since many hackers and cyber criminals often inject malicious software into random online advertising materials. The risk of getting displayed such malicious adverts in your browser is certainly there if an app like Poisism.com is on your PC. For this reason, we have prepared instructions that will show you how to remove the browser hijacker and uninstall all of its changes once and for all.
Some threats reinstall themselves if you don't delete their core files. We recommend downloading SpyHunter to remove harmful programs for you. This may save you hours and ensure you don't harm your system by deleting the wrong files.
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
A lot of users who are faced with a browser hijacker like Poisism.com for the first time have a difficulty to remove it successfully. The reason is, aside from uninstalling the unwanted browser extension that the intrusive app may have added, people should remove also any rogue hijacker-related files and settings from their computer and that requires a little extra time and effort. If you are willing to put that time and effort anyway, here’s a quick rundown of the steps you must complete:
- In order to get rid of the hijacker, start by looking for and uninstalling any applications that you don’t remember installing.
- Find and terminate any unwanted/rogue processes in the Task Manager by searching for suspicious ones.
- Look for unauthorized changes in the Startup items list and the Hosts file.
- Search the Registry for Poisism.com-related entries and delete them.
- Finally, remove the traces of Poisism.com from all browsers that you have installed on your computer.
Please review the steps in the text below for more detailed explanations.
The easiest way to view this removal guide and follow the Poisism.com removal steps is by opening it on your smartphone or other device. You may even want to create a bookmark for this page in your browser in order not to lose it until you complete the instructions and get rid of Poisism.com.
As a further step, we strongly recommend you to restart your PC in Safe Mode. This link has detailed explanations on that. Just follow it and once the system reboots in Safe Mode, proceed with the rest of the instructions in this removal guide.
Next, go to the Start Menu, Control Panel and select Uninstall a Program under Programs and Features.
To find the Control Panel, type control panel into the search box found below the Start Menu.
When removing possibly harmful software, seek for any suspicious-looking applications associated with Poisism.com first, then look for recent installs. Then, from the shortcut menu that comes when you right-click on the application icon, choose Uninstall. Follow the on-screen directions when uninstalling software to avoid leaving behind any data or settings from the unwanted program.
WARNING! READ CAREFULLY BEFORE PROCEEDING!
Type Task Manager into the Start Menu search bar. Next, open the Task Manager and look at the Processes tab to see what’s going on. Right-click on Poisism.com or any other process that you believe is associated with it and choose Open File Location from the pop-up menu that appears on the screen.
A malware scan of the process’ File Location Folder will reveal whether or not it is dangerous. The free virus scanner we’ve provided here can be used as a good starting point if you don’t have a trusted scanning tool at hand:
End all Poisism.com-related processes and remove all files and folders connected with the hijacker if the scanner detects danger in them.
If you see warnings about a particular process on reputable cyber-security sites, you should probably stop the process and delete all of its files and directories.
In the third step, you need to disable any questionable or unknown startup items. This can be done by unchecking them in the System Configuration window’s Startup section.
To open System Configuration, type msconfig in the search box on your computer (In the Start menu) and open the Startup tab. Then, remove the checkmarks of the startup items that look suspicious and save your changes by clicking the OK button.
Open the Hosts file by typing the following into the Start Menu search box:
In the comments below this article, copy and paste any suspicious-looking IP addresses added at the file’s end below “Localhost“. Once we take a look at these IPs, you will be notified and asked to delete any IPs that are found to be malicious from your file.
Next, open Network Connections by searching for it in the Start menu search box.
- Right-click on the Network Adapter you’re using to access the pop-up menu, and choose Properties from the listed options.
- Select Internet Protocol Version 4 (ICP/IP) and click the new Properties button at the bottom of the window.
- The Obtain DNS server automatically option should be selected and if it is not, make sure that you select it, and then click the Advanced option.
- Once you’ve deleted anything from the DNS tab, click on the OK button and close the opened windows.
- In this step, we will show you how to clean your browsers from components and setting changes that Poisism.com might have imposed without your approval.
First, head to the browser’s shortcut icon, right click on it and click > Properties.
Inside the Properties window, open the Shortcut tab.
Then, in the Target text box, delete anything that comes after “.exe“.
Once you’ve done so, open your default web browser and choose Tools > Extensions (or Add-ons) from the main drop-down menu. The main menu of the majority of browsers may be found in the upper-right corner of the window. Upper-left of the screen is where you’ll find Opera’s primary menu options.
If Chrome is the default browser that you are using, Choose Extensions from the drop-down menu under More Tools in the Chrome menu.
Once inside the Extensions/Add-ons section, search for components that have been installed without your approval, such as anything associated with Poisism.com or unfamiliar extensions. You may need to disable these extensions first before you delete them.
Next, back to the main menu of your browser, choose Tools (or Settings) > Privacy (and Security)> Clear browsing data (or Clear data). Then carefully clear the recent browsing data that may contain sites loaded by the browser hijacker. If the window that opens has an Advanced option select it and tick each box except the one for your Passwords.
Apply the instructions above for any other browsers you have installed on your system to clean it from hijacker elements and unauthorized settings.
Open the Start menu and, in the Windows search box, type Regedit, then click Enter. Remember that in order to use regedit.exe, you must be logged in as an administrator.
Inside the Registry Editor, hold down CTRL and F at the same time and enter the name of the browser hijacker into the Find box. Select all items that are found and remove them using the right click menu. Repeat the search and remove every item that is found until no more results for Poisism.com are found.
If no hijacker entries appear this way, manually search for them in these directories in the Registry Editor’s left-hand pane:
- HKEY_CURRENT_USER—-Software—–Random Directory.
- HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
- HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random
If you have difficulties to determine which folders are linked to Poisism.com, you can ask us for help in the comments. Look for keys (also known as subfolders) with long and random-looking names. Remove just the hijacker-related items from the registry, and don’t make any other changes.
Please let us know if the problem with Poisism.com persists by dropping us a message in the comments. If you detect any suspicious-looking files, you can use our free online virus scanner or the professional anti-virus program that we recommend to see if they have been infected with the browser hijacker.