The System Has Detected Intrusion is a misleading page that created to force you call a fake Microsoft Tech Support. If the Google Chrome, Firefox, IE and Microsoft Edge opens this web site then most probably that your machine is infected with an adware (also known as ‘ad-supported’ software). The adware is an unwanted software that is going to show you a large number of ads and deals. Of course, it’s not a malware or virus in the “general meaning” of this word. It’ll not delete or damage your files, but it can alter some machine’s settings or download and install other malicious applications.
So, you’d better to remove adware using the guide below and thereby remove System Has Detected Intrusion pop up.
“System Has Detected Intrusion” is a fake alert
Technically, the ad supported software is not a virus, but it does bad things, it generates a large amount of popup ads. It may download and install on to your PC other malicious and unwanted applications without your permission, force you to visit malicious or misleading web-sites such as “System Has Detected Intrusion” page. Moreover, the ad-supported software can install web-browser hijacker. Once installed, it’ll change your internet browser setting like homepage, newtab and search engine by default with an unwanted web page.
The adware usually affects only the Chrome, Firefox, MS Edge and Microsoft Internet Explorer by changing the browser’s settings or installing a harmful extensions. Moreover, possible situations, when any other internet browsers will be affected too. The adware will perform a scan of the machine for internet browser shortcuts and modify them without your permission. When it infects the internet browser shortcuts, it will add the argument like ‘http://site.address’ into Target property. So, each time you start the web browser, you will see an annoying System Has Detected Intrusion web page.
So, obviously, you need to get rid of the adware as soon as possible. Use the free steps below. This guide will help you clean your personal computer of ad supported software and thereby remove the System Has Detected Intrusion intrusive popup ads.
Remove “System Has Detected Intrusion”
Without a doubt, the adware is harmful to your PC system. So you need to quickly and completely remove this ad-supported software which shows misleading System Has Detected Intrusion popup error on your PC system. To delete this adware, you may use the manual removal instructions that are given below or free malware removal utility such as Zemana AntiMalware (ZAM), MalwareBytes Anti Malware or AdwCleaner (all are free). We advise you use automatic removal way that will help you to delete System Has Detected Intrusion popup error easily and safely. Manual removal is best used only if you are well versed in machine or in the case where ad supported software is not uninstalled automatically. Certain of the steps will require you to reboot your computer or exit the web page. So, read this guide carefully, then bookmark or print it for later reference.
Manual System Has Detected Intrusion pop-up removal
Read this “How to remove” section to know how to manually get rid of ad supported software that created to show misleading System Has Detected Intrusion popup error within your browser. Even if the step-by-step tutorial does not work for you, there are several free malware removers below that can easily handle such ad-supported software which cause misleading System Has Detected Intrusion pop up to appear.
Uninstall suspicious applications through the Control Panel of your computer
It is of primary importance to first identify and get rid of all potentially unwanted software, adware programs and hijacker infections through ‘Add/Remove Programs’ (Windows XP) or ‘Uninstall a program’ (Windows 10, 8, 7) section of your MS Windows Control Panel.
Windows 8, 8.1, 10
First, click Windows button
, then click Search 
. Type ‘Control panel’and press Enter as shown on the image below.
When the ‘Control Panel’ opens, press the ‘Uninstall a program’ link under Programs category as shown on the image below.
You will see the ‘Uninstall a program’ panel like below.
Very carefully look around the entire list of programs installed on your personal computer. Most likely, one or more of them are responsible for the appearance of popup ads and internet browser redirect to the annoying System Has Detected Intrusion web-page. If you have many programs installed, you can help simplify the search of malicious software by sort the list by date of installation. Once you have found a suspicious, unwanted or unused application, right click to it, after that press ‘Uninstall’.
Windows XP, Vista, 7
First, click ‘Start’ button and select ‘Control Panel’ at right panel as on the image below.
After the Windows ‘Control Panel’ opens, you need to click ‘Uninstall a program’ under ‘Programs’ as displayed below.
You will see a list of programs installed on your system. We recommend to sort the list by date of installation to quickly find the programs that were installed last. Most likely they responsibility for the appearance of pop-ups and browser redirect. If you are in doubt, you can always check the program by doing a search for her name in Google, Yahoo or Bing. After the program which you need to uninstall is found, simply click on its name, and then click ‘Uninstall’ as shown on the image below.
Fix infected web browsers shortcuts to remove System Has Detected Intrusion redirect
When installed, this ad supported software may add an argument such as “http://site.address” into the Target property of the desktop shortcut for the FF, Chrome, Internet Explorer and MS Edge. Due to this, every time you run the internet browser, it will show an undesired ad web-page.
To clear the web browser shortcut, right-click to it and select Properties. On the Shortcut tab, locate the Target field. Click inside, you will see a vertical line – arrow pointer, move it (using -> arrow key on your keyboard) to the right as possible. You will see a text like “http://site.address” which has been added here. You need to delete it.
When the text is removed, press the OK button. You need to clean all shortcuts of all your web-browsers, as they may be infected too.
Remove System Has Detected Intrusion popup scam from Firefox
The Firefox reset will keep your personal information such as bookmarks, passwords, web form auto-fill data, restore preferences and security settings, get rid of redirections to unwanted System Has Detected Intrusion web-page and adware.
First, run the FF and press 
button. It will open the drop-down menu on the right-part of the web-browser. Further, click the Help button (
) as displayed on the image below
.
In the Help menu, select the “Troubleshooting Information” option. Another way to open the “Troubleshooting Information” screen – type “about:support” in the web browser adress bar and press Enter. It will show the “Troubleshooting Information” page as shown on the image below. In the upper-right corner of this screen, press the “Refresh Firefox” button.
It will show the confirmation dialog box. Further, click the “Refresh Firefox” button. The Mozilla Firefox will begin a task to fix your problems that caused by the adware which causes misleading System Has Detected Intrusion pop-up on your web browser. Once, it’s finished, click the “Finish” button.
Delete System Has Detected Intrusion pop-up error from Internet Explorer
By resetting Internet Explorer internet browser you restore your browser settings to its default state. This is first when troubleshooting problems that might have been caused by ad supported software which created to display misleading System Has Detected Intrusion pop-up scam within your internet browser.
First, open the Internet Explorer. Next, click the button in the form of gear (
). It will display the Tools drop-down menu, click the “Internet Options” as shown below.
In the “Internet Options” window click on the Advanced tab, then click the Reset button. The IE will open the “Reset Internet Explorer settings” window as shown on the screen below. Select the “Delete personal settings” check box, then click “Reset” button.
You will now need to restart your computer for the changes to take effect.
Remove System Has Detected Intrusion pop up error from Chrome
Use the Reset web browser tool of the Google Chrome to reset all its settings such as new tab, home page and search engine by default to original defaults. This is a very useful tool to use, in the case of internet browser redirects to undesired ad web sites such as System Has Detected Intrusion.
- First, run the Google Chrome and click the Menu icon (icon in the form of three horizontal stripes).
- It will display the Google Chrome main menu, click the “Settings” menu.
- Next, click “Show advanced settings” link, which located at the bottom of the Settings page.
- On the bottom of the “Advanced settings” page, press the “Reset settings” button.
- The Chrome will open the reset settings dialog box as on the image above.
- Confirm the web-browser’s reset by clicking on the “Reset” button.
- To learn more, read the blog post How to reset Chrome settings to default.
Remove unwanted Scheduled Tasks
If the annoying System Has Detected Intrusion web site opens automatically on Windows startup or at equal time intervals, then you need to check the Task Scheduler Library and remove all the tasks that have been created by malicious software.
Press Windows and R keys on your keyboard simultaneously. It will open a prompt which titled as Run. In the text field, type “taskschd.msc” (without the quotes) and press OK. Task Scheduler window opens. In the left-hand side, click “Task Scheduler Library”, as on the image below.
Task scheduler, list of tasks
In the middle part you will see a list of installed tasks. Select the first task, its properties will be open just below automatically. Next, press the Actions tab. Necessary to look at the text which is written under Details. Found something like “explorer.exe http://site.address” or “chrome.exe http://site.address” or “firefox.exe http://site.address”, then you need remove this task. If you are not sure that executes the task, then google it. If it’s a component of the adware, then this task also should be removed.
Further click on it with the right mouse button and select Delete as shown below.
Task scheduler, delete a task
Repeat this step, if you have found a few tasks that have been created by ‘ad-supported’ software. Once is finished, close the Task Scheduler window.
System Has Detected Intrusion popup error automatic removal
There are not many good free antimalware programs with high detection ratio. The effectiveness of malicious software removal tools depends on various factors, mostly on how often their virus/malware signatures DB are updated in order to effectively detect modern malicious software, adware, browser hijacker infections and other PUPs. We recommend to run several programs, not just one. These applications which listed below will help you delete all components of the ad supported software from your disk and Windows registry and thereby remove System Has Detected Intrusion pop-up scam.
Scan and free your internet browser of System Has Detected Intrusion pop up error with Zemana Anti-malware
We suggest using the Zemana Anti-malware. You may download and install Zemana Anti-malware to detect adware and thereby get rid of System Has Detected Intrusion pop-up scam from the Google Chrome, FF, MS Edge and Microsoft Internet Explorer internet browsers. When installed and updated, the malicious software remover will automatically scan and detect all threats present on your personal computer.
Now you can install and run Zemana Anti-Malware to get rid of System Has Detected Intrusion popup scam from your web-browser by following the steps below:
Click the following link to download Zemana setup file called Zemana.AntiMalware.Setup on your PC system.
159476 downloads
Author: Zemana Ltd
Category: Security tools
Update: July 16, 2019
Start the installation package after it has been downloaded successfully and then follow the prompts to install this utility on your PC.
During install you can change some settings, but we suggest you do not make any changes to default settings.
When install is finished, this malicious software removal tool will automatically launch and update itself. You will see its main window as shown on the screen below.
Now click the “Scan” button to perform a system scan with this utility for the adware that developed to show misleading System Has Detected Intrusion popup within your web browser. This process can take some time, so please be patient. While the Zemana Free is scanning, you can see how many objects it has identified either as being malicious software.
When Zemana Free has completed scanning your computer, Zemana AntiMalware (ZAM) will open a screen which contains a list of malicious software that has been detected. When you’re ready, click “Next” button.
The Zemana will delete ad supported software that causes internet browsers to display misleading System Has Detected Intrusion pop-up scam and add items to the Quarantine. After the procedure is finished, you can be prompted to restart your PC system to make the change take effect.
Use Malwarebytes to delete System Has Detected Intrusion pop up scam
Remove System Has Detected Intrusion pop up scam manually is difficult and often the ad-supported software is not completely removed. Therefore, we recommend you to use the Malwarebytes Free that are completely clean your system. Moreover, the free program will allow you to remove malware, potentially unwanted programs, toolbars and hijackers that your PC system can be infected too.
Download MalwareBytes by clicking on the following link and save it to your Desktop.
317526 downloads
Author: Malwarebytes
Category: Security tools
Update: April 15, 2020
After downloading is finished, close all programs and windows on your system. Open a directory in which you saved it. Double-click on the icon that’s called mb3-setup as displayed on the image below.
When the installation starts, you’ll see the “Setup wizard” that will help you setup Malwarebytes on your computer.
Once install is complete, you will see window like below.
Now click the “Scan Now” button to begin checking your computer for the adware that cause misleading System Has Detected Intrusion pop-up to appear. This procedure can take quite a while, so please be patient. While the MalwareBytes Anti Malware (MBAM) tool is checking, you can see how many objects it has identified as being infected by malicious software.
As the scanning ends, MalwareBytes AntiMalware will open a list of found threats. Next, you need to click “Quarantine Selected” button.
The Malwarebytes will now remove adware that created to show misleading System Has Detected Intrusion popup within your browser and move items to the program’s quarantine. When disinfection is finished, you may be prompted to reboot your machine.
The following video explains step-by-step guide on how to remove hijacker, adware and other malicious software with MalwareBytes Free.
Scan and clean your machine of adware with AdwCleaner
AdwCleaner is a free removal tool that can scan your system for a wide range of security threats such as malware, ad supported softwares, PUPs as well as ‘ad supported’ software that created to display misleading System Has Detected Intrusion popup scam within your internet browser. It will perform a deep scan of your PC system including hard drives and MS Windows registry. When a malicious software is detected, it will help you to remove all detected threats from your PC system with a simple click.
- Download AdwCleaner by clicking on the following link and save it directly to your Microsoft Windows Desktop.
AdwCleaner download
220713 downloads
Version: 8.3.2
Author: Xplode, MalwareBytes
Category: Security tools
Update: April 28, 2022
- Select the folder in which you saved it as Desktop, and then press Save.
- Once downloading is complete, launch the AdwCleaner, double-click the adwcleaner_xxx.exe file.
- If the “User Account Control” prompts, press Yes to continue.
- Read the “Terms of use”, and click Accept.
- In the AdwCleaner window, press the “Scan” to start scanning your PC for the adware that cause misleading System Has Detected Intrusion pop-up scam to appear. Depending on your system, the scan may take anywhere from a few minutes to close to an hour. While the AdwCleaner is checking, you can see count of objects it has identified either as being malicious software.
- When the scan is finished, the results are displayed in the scan report. Review the results once the tool has done the system scan. If you think an entry should not be quarantined, then uncheck it. Otherwise, simply press “Clean”. If the AdwCleaner will ask you to restart your computer, click “OK”.
The step-by-step guide shown in detail in the following video.
How to stop System Has Detected Intrusion popup
Run ad-blocker program such as AdGuard in order to stop ads, malvertisements, pop-ups and online trackers, avoid having to install malicious and adware browser plug-ins and add-ons that affect your PC system performance and impact your PC security. Surf the Net anonymously and stay safe online!
- Download AdGuard application from the link below and save it directly to your MS Windows Desktop.
Adguard download
25646 downloads
Version: 6.4
Author: © Adguard
Category: Security tools
Update: November 15, 2018
- Once downloading is complete, start the downloaded file. You will see the “Setup Wizard” program window. Follow the prompts.
- After the install is done, press “Skip” to close the installation program and use the default settings, or click “Get Started” to see an quick tutorial that will allow you get to know AdGuard better.
- In most cases, the default settings are enough and you don’t need to change anything. Each time, when you run your machine, AdGuard will start automatically and stop pop up ads, web-pages such System Has Detected Intrusion, as well as other malicious or misleading web-sites. For an overview of all the features of the program, or to change its settings you can simply double-click on the icon named AdGuard, that can be found on your desktop.
How to prevent System Has Detected Intrusion pop-up scam from getting inside your computer
Most commonly the ad supported software come as a part of free programs. So, think back, have you ever download and run any free applications? Because most users, in the Setup Wizard, simply click the Next button and do not read any information such as ‘Terms of use’ and ‘Software license’. This leads to the fact that the PC is infected and all your web-browsers configured to open a ton of undesired System Has Detected Intrusion popups. Even removing the free programs that contains this ad-supported software, the intrusive ads does not disappear. Therefore, you must follow the few simple steps above to clean your computer from the adware and thereby delete System Has Detected Intrusion pop-up.
Finish words
Now your system should be clean of the adware which cause misleading System Has Detected Intrusion popup error to appear. Uninstall AdwCleaner. We suggest that you keep Zemana Free (to periodically scan your machine for new adwares and other malicious software) and AdGuard (to help you stop annoying pop-up ads and harmful pages). Moreover, to prevent adwares, please stay clear of unknown and third party applications, make sure that your antivirus application, turn on the option to scan for PUPs (potentially unwanted programs).
If you need more help with System Has Detected Intrusion pop up error related issues, go to our Spyware/Malware removal forum.
