Random CoronaBorealis ads within Chrome, Firefox, IE and Edge is a sign that you computer is infected with an adware or potentially unwanted program (PUP). It is important, of course, to distinguish between ads which is placed legitimate advertisers on web sites, and frequent annoying advertisements, which covers a big part of browser’s window. All of these ads from CoronaBorealis are caused by a malicious extension that has been installed by an adware and PUP that usually infects system through the use a free programs such as free pdf creator, free video player, free youtube downloader. So, when you have installed a free software that you need, this adware has been installed automatically too.
Most commonly, an adware that shows ads from CoronaBorealis is bundled within the installation packages from a free hosting and file sharing web sites. So, to protect yourself in the future, please read term of use and user agreement very carefully before installing any software or otherwise you can end up with another adware on your computer.
If you still are not sure that your computer is infected with an adware that shows CoronaBorealis ads on your screen, then check your computer for the following other common signs of infection:
- Is your home page or default search engine different than what you originally set it as.
- Antivirus or antispyware software detects an adware or PUP infections.
- Your Internet connection is slow.
- Annoying advertisements that signed with “Ads By CoronaBorealis”, “Brought to you by CoronaBorealis”, “Powered by CoronaBorealis” or “You’ve received a premium offer from CoronaBorealis”.
- Your browser displays fake alerts which recommend to update a flash player or your antivirus.
Last but not least, the adware can function as spyware – creates your Internet profile – what sites you`re browsing, when you`re running a browser, what you’re looking for on the Internet and so on. That is, it is stealing your personal information.
So, if your computer is infected with CoronaBorealis advertisements, then most importantly, do not wait! Clean your computer as soon as possible. Use the step-by-step guide below.
How to remove CoronaBorealis ads (Step-by-step instructions)
The following instructions is a full step-by-step guide, which will help you to remove CoronaBorealis pop-up ads from your computer. Moreover, the steps below will help you to uninstall potentially unwanted software such as adware and toolbars that your PC may be infected. Please do the instructions step by step. If you need a help or have any questions, then ask for our assistance here or type a comment below.
1. Delete CoronaBorealis associated adware by using Windows Control Panel.
2. Remove CoronaBorealis adware and malicious extensions from Mozilla Firefox, Internet Explorer and Google Chrome with AdwCleaner.
3. Remove CoronaBorealis malware with JRT (Junkware Removal Tool).
4. Remove CoronaBorealis related files and registry keys with MalwareBytes Anti-malware.
1. Delete CoronaBorealis associated adware by using Windows Control Panel.
Press Windows key 
, then click Search 
. Type Control panel and press Enter. If you using Windows XP or Windows 7, then click Start and select Control Panel. It will open the Windows Control Panel as shown below.
Click Uninstall a program 
It will open a list of all programs. Scroll through the all list, and uninstall any unknown programs.
2. Remove CoronaBorealis adware and malicious extensions from Mozilla Firefox, Internet Explorer and Google Chrome with AdwCleaner.
Download AdwCleaner from the link below.
Once finished, open a directory in which you saved it. You will see a icon like below.
Double click the AdwCleaner desktop icon. Once this tool is started, you will see a screen like below.
Press Start button to perform a system scan for CoronaBorealis adware and malicious extensions. Once AdwCleaner has finished, it will open a scan report as shown below.
Review the report and then click Cleaning button. It will display a prompt.
Click OK. When the cleaning process is finished, AdwCleaner may ask you to reboot your computer.
When your PC is started, you will see an AdwCleaner log.
3. Remove CoronaBorealis malware with JRT (Junkware Removal Tool).
Download Junkware Removal Tool from the link below.
JRT (Junkware Removal Tool) download link.
Open a directory in which you saved the JRT. You will see an icon like below.
Run it. Junkware Removal Tool will try to update itself, if a new version is available. Once updating is done, you will see JRT DISCLAIMER.
Please read and press any key to continue. First, JRT creates a restore point and once complete, it will start a scan of a computer.
During the scan, Junkware Removal Tool will check Startups, Services, Processes, Files, Folders, Registry keys, Registry values, Mozilla Firefox, Internet Explorer (EDGE), Google Chrome extensions and remove all malicious software that has been found.
When cleaning a computer is completed, JRT will display a log file.
4. Remove CoronaBorealis related files and registry keys with MalwareBytes Anti-malware.
Download MalwareBytes Anti-malware (MBAM) from the link below.
MalwareBytes Anti-malware download link
Once downloaded, close all programs and windows on your computer. Open a directory in which you saved it. Double-click on the icon that named mbam-setup like below.
When the installation begins, you will see the Setup – Wizard that will help you install MalwareBytes Anti-malware on your computer.
Once installation is complete, you will see window similar to the one below.
Now click on the Scan Now button to start scanning your computer. This procedure can take some time, so please be patient.
When the scan is finished, make sure all entries have “checkmark” and click Remove Selected button. MalwareBytes Anti-malware will start to remove CoronaBorealis related files, folders, registry keys. Once disinfection is completed, you may be prompted to Restart.
The End.
Your computer should now be free of CoronaBorealis ads. If you need help with the instructions, then ask for help here.
