Ontology.dll: Brief Description

Ontology.dll is a kind of Trojan virus made by potent hackers for evil purposes. It’s a dangerous computer threat that enters your PC secretly and contributes a series of malicious activities in the background. Initially, it makes various critical modifications in system’s settings and manages to activate itself every time the computer is started. It shows fake error messages and tries to scam you into downloading infectious program presenting it as a useful tool which will supposedly fix the issues. It continuously delivers annoying security warnings, error messages etc. and ruins your web sessions drastically. Due to the presence of this perilous Trojan, your web browsing becomes very difficult. You will be not able to surf the net without being troubled.

Ontology.dll disables all the security measures including anti-virus tool and windows firewalls and opens backdoors for other Online threats. It may easily bring more infections likes of adware, rootkits, spyware, worms in the PC and turns it into a malware-hub. It helps a deadly crypto-virus to attack the computer and lock all your crucial files to make illicit revenues from you. Moreover, it shows fake update notifications stating that your Java Player is out-dated and needs to be updated quickly to avoid PC threats. You are also given an update link but we highly advise to not click on it. Remember all these claims are false. This is just a trap to make you fool into downloading bogus software.

This notorious virus promotes various products or services and forces you to buy them even if you don’t require them. Worst thing about this Trojan is that it puts your privacy at high risk. It steals all your private and credential data such as login ids, passwords, credit card number, bank account and other financial details and sends that information to cyber criminals for evil purposes. Therefore, it may cause a severe Online robbery or huge commercial loss. Ontology.dll bombards your computer screen with thousands of irritating ads including suspicious links. By clicking on these ads, you are rerouted to various third party web pages.

Freeware downloads, visiting malicious sites, transferring data via infected USB drives, using torrent files or pirated software etc. are the prime reasons behind its intrusion in the system. So, stay away from these malicious sources to keep the machine safe and secured. Talking about its harmful properties, It shows fake update notifications, error messages, warning alerts etc. and scams you into downloading infectious program. It reduces the PC’s speed badly by taking up huge amount of CPU resources. Therefore, don’t waste any time, just follow the simple steps given below and eliminate Ontology.dll from the work-station.


Steps To Remove Ontology.dll From Compromised Computer

The infections like Ontology.dll or similar ones or those belong to other malware category are all designed to generate with only ill intention to make money for its developers who make use of any technique to force you down. However, most of the security experts associated with different security associations say this is not much harmful browser and can be removed from an infected computer by getting through some steps. If you follow the steps in the same order and with full attention as described in the procedures below, we hope you can also free up your PC easily. It’s recommended to take a hard copy of the guidelines on paper or get another computer to assist you following the steps without any hassles.

Step 1:Track and remove Ontology.dll from computer’s processes from task manager.

Step 2:Locate and delete the definition of this program from startup files, registry files, and host files.

Step 3:Removal of Ontology.dll from all reputed browsers.

Step 4:Delete Ontology.dll with an automatic solution(The Safest and most recommended method)

Step 1: Track and remove Ontology.dll from computer’s processes from task manager.

  • Launch the Task Manager by pressing a key combination CTRL+SHIFT+ESC simultaneously.

  • Review the suspicious processes and note down its file location on computer.end-malicious-process

  • Terminate the processes now.

  • Open the “Run” command box and enter the noted down location to open in file explorer.

  • Delete the file permanently.

Step 2: Locate and delete the definition of this program from startup files, registry files, and host files

  • Launch the file explorer or any folder from my computer.

  • Click on “View” option in the above Menu (Older Windows version’s user may go to control panel to open “Folder options”)

  • Choose “Folder and Search Options”

  • Click over “View” tab.

  • Scroll down to find “Show hidden files and folders” option, and check it in the check box.

  • Find “Hide protected operating system files” and uncheck it. (This will allow you to see super-hidden files in any folder to identify the suspicious ones.)

  • Click “Apply” then “Ok”

Cleaning Ontology.dll definitions from Windows registry

  • To open Windows registry editor, click Win+R combination.

  • Type “regedit” ro simply copy and paste in the command line

  • Press Ok.

  • Navigate to below mentioned registry files depending on your OS versions (32 bit or 64 bit) and delete the files.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run] or

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] or


  • Now Launch the Windows explorer and navigate to %appdata% to find and delete suspicios executable files from there, and close the window.

Fixing Hosts file to block the unwanted redirections on all active browsers

  • Open windows explorer and navigate to Windows directory.

  • Go to System32/drivers/etc/host

  • open the host file and notice it. If the system is hijacked by the infection you would see several IP definitions at the bottom.

  • Select those IP addresses and delete them. (Don’t delete the local host entry)

  • Save and close the file, and exit the explorer window.

Step 3: Removal of Ontology.dll from all reputed browsers (Steps included for Chrome, Firefox & Internet Explorer)

Google Chrome

  • Launch Chrome browser.

  • Click over the main menu icon and select Tools or More Tools, then Extensions.

  • Scroll down to notice the list of installed extensions to find suspicious one and click the bin option beside it.

  • Click remove button to confirm the deletion.

  • Finally, Reset the Chrome settings to default leaving nothing behind.

Mozilla Firefox

  • Launch the Firefox and press CTRL+SHIFT+A to open extension Window.

  • Look for the Ontology.dll extension and Disable it.

  • Now go to Help section.

  • Click over Troubleshooting information then hit the Reset button.

  • Confirm the act to reset the browser.

Internet Explorer

  • Simply, open the browser and click thee Gear Icon on the upper right corner.

  • Navigate to Internet options and click it.

  • Now, navigate to Toolbars and Extensions, to see the list of installed addons to find unwanted one.

  • Disable or delete the selected extensions permanently.

  • In order to reset the Ie, click over Advanced tab, and click Reset.

  • Press OK button to confirm.

Cleaning the browser’s shortcuts on the computer is also recommended in most of the cases and should be accomplished for all installed browsers, for which the steps are:

  • Select the browser short-cut, and right click on it.

  • Navigate the properties and click it.

  • In the opened window, find the target option, and remove the argument for Ontology.dll.

  • Apply the changes.

Step 4: Remove Ontology.dll with an automatic solution

Although the removal method through manual instructions are effective and proven to provide the best results, still some of the victimized users may fail to get the results as per their desire. This can happen due to lack of technical consent to access most of the administrative utilities as used in above guidelines. If you also got stuck through the instructions or seeking the safest method which needs not any high end manual steps, then opting an automatic solution could be the best solution. You just need to do a few instructions taken in practice to install and scan the system deeply that will fix all issues and remove Ontology.dll completely. The required steps to do so is all here mentioned.


Easily remove all online trending threats from your PC safely at just single click.

Step 1:Download and install Ontology.dll removal tool and install it on your computer (Note:this is a free scanner that will detect the present malwares on your system only. In order to fix the threats completely, you would have to buy its full version to remove the threats.)

Step 1

Step 2: After the installation is finished, run the scanner and you will see the two options as depicted in the image below. Click on “Scan Computer Now” button.

Step 2

Step 3: In this step, you would see the scanning process bar with detection of found threats and its short description along-with its categorized thumbnail.

Step 3

Step 4: Lastly, the scanner finishes scanning the computer to show full list of detected threats on computer. Just click on “Fix Threats” button to complete the removal that hardly takes a few moments depending upon the nature and severity level of the malware items.

Step 4