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Remove “Microsoft Error: Unknown System Failure” pop-up virus (Removal Guide) - Free Instructions

removal by Olivia Morelli - - | Type: Adware

“Microsoft Error: Unknown System Failure” is a scam virus which forces people to believe that their personal data is in danger

“Microsoft Error: Unknown System Failure" virus

Microsoft Error: Unknown System Failure is a scam which bombards the screen with deceptive notifications that claim scary things. If you take a look at these messages, you should see that they are far from looking alike as original notifications. However, some people fall for believing that system failure has occurred and sensitive information is put at risk. Additionally, Error: Unknown System Failure might act not only as a technical support scam[1] but also have signs of adware as scamming content is often a sign of an ad-supported program[2] hiding in the system.

Name Microsoft Error: Unknown System Failure
Type Scam/potentially unwanted program
Goal To convince users to dial via the provided mobile phone number and reveal some details about his/her system or swindle money by offering purchase of fake security software
Caused by Usually, adware is the main cause of such scamware but it can also be met on third-party networks or while using illegitimate services on the Internet sphere
Possible danger Users can run into data theft after revealing important information, experience remote access to their computers which might lead to secret malware infiltration
Spreading Bundles of original products often carry potentially unwanted content such as adware
Elimination Use Reimage for the removal of this scam. Manual guidelines are also provided at the end of the page

Content that comes from Microsoft Error: Unknown System Failure pop-up virus can never be trusted. Once you receive such message, you will be told that your computer system is severely damaged, that personal data of yours is at risk of exposure, and the only way to fix all problems is by contacting the fake Microsoft support.

Together with Error: Unknown System Failure you will see a suspicious number added. Note that calling it is not recommendable at all as you will find only scammers hiding there. Once you reach them, you will supposedly be urged to provide some sensitive information about yourself or give remote access for “fixing purposes”.

If hackers connect to your computer, they might monitor various malicious actions such as gathering sensitive information, injecting malware,[3] mining cryptocurrency, and running different types of malicious processes in the background. You should remove Microsoft Error: Unknown System Failure from the computer and avoid dialing the fake number.

Nevertheless, scammers who are supporting Error: Unknown System Failure might also promote fake security software and provoke users to download such false programs by convincing them that the tool will take care of all system error, no more threats will be lurking in the machine, and it will work at maximum speed.

“Microsoft Error: Unknown System Failure" adware virus illustration
“Microsoft Error: Unknown System Failure" a scam which can be met on potentially infectious websites

Our suggestion would be not to postpone the Microsoft Error: Unknown System Failure removal and get rid of the adware program that is causing the scam message to bombard your computer screen. Using Reimage will automatically get rid of the cyber threat and all additional content that it might have brought to the machine.

For those who have no security software installed, we have prepared a brief guide on how to recognize fake messages such as Error: Unknown System Failure manually:

  • When you see a security alert or notification informing about some supposed PC infection or error, pay attention where this alert is displayed. If you find it displayed on some random web page, there is no doubt that the notification is purely a scam. You should close such website immediately and scan your PC with antivirus software.
  • Analyze the content of the message. This particular virus will usually threaten that the security of your device is at stake and you may lose some of your valuable information if you do not take action to fix it. Most TTS scams will indicate a phone number, urging the victims to call it and receive some help from Microsoft professionals. Here is an example illustrating contents of the fraudulent popup:

Microsoft Error: Unknown System Failure
Internal Configuration: Altered Your Windows Firewall Has Been Disabled
Possibly due to Internet Infection or Unauthorized Connection through your IP-Address It can cause the following things; 1) Possible Data Loss
2) Identity Theft
3) Loss of Email/Social Networking/ Personal Passwords
4) Credentials Stored or Used on the Computer Consule Microsoft Network Security Advisor
Immediately on the Toll Free Number:

  • Run a test drive with a professional antivirus utility. Legitimate tools will provide you with a genuine report about your computer’s situation, and it will most likely indicate adware infection which you will have to get rid of. For more suggestions on how to remove Microsoft Error: Unknown System Failure virus from your PC skip to the end of the article.

“Microsoft Error: Unknown System Failure" scam
“Microsoft Error: Unknown System Failure" is a completely fake message which tries to provoke you to dial the given phone number

Embedding adware on the computer

According to researchers from SenzaVirus.it,[4] potentially unwanted programs are one of the most common threats distributed throughout the wild. Unfortunately, not all users are aware of how adware enters computers. If you are one of those people, you should remember that the main vector of adware distribution is software packages.

Suspicious applications often get bundled with some popular freeware[5] or shareware application and install on the computer when Quick or Recommended settings are chosen for the software installation mode. That is why the main reason why users often complain about potentially unwanted programs appearing out of nowhere.

To avoid undesirable programs, you should always choose Advanced or Custom installation modes and deselect additional components manually. Furthermore, staying away from suspicious-looking websites is also a measure you should take to ensure your computer's safety. It would be even easier if you used antimalware with a safe browsing function.

Eliminate “Microsoft Error: Unknown System Failure” scam from your PC

In order to remove “Microsoft Error: Unknown System Failure” from your PC successfully, you should locate and delete the root of all problems — the adware program. It may be disguised as some small program or a browser helper object, thus it is useful to have some specialized software to determine the potentially unwanted components automatically.

Instructions that our experts have prepared below this article may also help you perform “Microsoft Error: Unknown System Failure” removal manually, but if you want to save time, you should definitely choose the automatic elimination option instead. You can install a program from our suggested list or any other similar tool of your likings.

If “Microsoft Error: Unknown System Failure” pop-up is not just a simple occurrence on a third-party website and the cause of its appearance is adware, you should check web browsers for adware-related content also. Furthermore, you might find your browser settings altered which also needs to be undone for further proper usage.

You can remove virus damage automatically with a help of one of these programs: Reimage, SpyHunter 5Combo Cleaner, Malwarebytes. We recommend these applications because they detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with SpyHunter 5.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove “Microsoft Error: Unknown System Failure” pop-up virus, follow these steps:

Remove “Microsoft Error: Unknown System Failure” pop-up from Windows systems

In case you cannot exit the website you are seeing the“Microsoft Error: Unknown System Failure” error on, you should enter Windows Task Manager by pressing CTRL+ALT+DEL and terminate the browser from there. Then follow instructions below:

  1. Click Start Control Panel Programs and Features (if you are Windows XP user, click on Add/Remove Programs). Click 'Start -> Control Panel -> Programs and Features' (if you are 'Windows XP' user, click on 'Add/Remove Programs').
  2. If you are Windows 10 / Windows 8 user, then right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel and Uninstall a Program. If you are 'Windows 10 / Windows 8' user, then right-click in the lower left corner of the screen. Once 'Quick Access Menu' shows up, select 'Control Panel' and 'Uninstall a Program'.
  3. Uninstall “Microsoft Error: Unknown System Failure” pop-up and related programs
    Here, look for “Microsoft Error: Unknown System Failure” pop-up or any other recently installed suspicious programs.
  4. Uninstall them and click OK to save these changes. Right click on each of suspicious entries and select 'Uninstall'

Erase “Microsoft Error: Unknown System Failure” pop-up from Mac OS X system

  1. If you are using OS X, click Go button at the top left of the screen and select Applications. Cick 'Go' and select 'Applications'
  2. Wait until you see Applications folder and look for “Microsoft Error: Unknown System Failure” pop-up or any other suspicious programs on it. Now right click on every of such entries and select Move to Trash. Click on every malicious entry and select 'Move to Trash'

Eliminate “Microsoft Error: Unknown System Failure” pop-up from Internet Explorer (IE)

You should eliminate all dubious content from your Internet Explorer browser. Look for suspicious extensions, plug-ins, and add-ons:

  1. Remove dangerous add-ons
    Open Internet Explorer, click on the Gear icon (IE menu) on the top right corner of the browser and choose Manage Add-ons. Click on menu icon and select 'Manage add-ons'
  2. You will see a Manage Add-ons window. Here, look for “Microsoft Error: Unknown System Failure” pop-up and other suspicious plugins. Disable these entries by clicking Disable: Right click on each of malicious entries and select 'Disable'
  3. Change your homepage if it was altered by virus:
    Click on the gear icon (menu) on the top right corner of the browser and select Internet Options. Stay in General tab.
  4. Here, remove malicious URL and enter preferable domain name. Click Apply to save changes. Delete malicious URL, enter your desired domain name and click 'Apply' to save changes
  5. Reset Internet Explorer
    Click on the gear icon (menu) again and select Internet options. Go to Advanced tab.
  6. Here, select Reset.
  7. When in the new window, check Delete personal settings and select Reset again to complete “Microsoft Error: Unknown System Failure” pop-up removal. Go to 'Advanced' tab and click on 'Reset' button. Now select 'Delete personal settings' and click on 'Reset' button again

Get rid of “Microsoft Error: Unknown System Failure” pop-up virus from Microsoft Edge

Resetting your Microsoft edge browser may help you eliminate remaining changes that the virus could have made to it:

Reset Microsoft Edge settings (Method 1):

  1. Launch Microsoft Edge app and click More (three dots at the top right corner of the screen).
  2. Click Settings to open more options.
  3. Once Settings window shows up, click Choose what to clear button under Clear browsing data option. Go to Settings and select 'Choose what to clear'
  4. Here, select all what you want to remove and click Clear. Select 'Clear' button
  5. Now you should right-click on the Start button (Windows logo). Here, select Task Manager. Open the start menu and select 'Task Manager'
  6. When in Processes tab, search for Microsoft Edge.
  7. Right-click on it and choose Go to details option. If can’t see Go to details option, click More details and repeat previous steps. Right-click 'Microsoft Edge' and select 'Go to details' Select 'More details' if 'Go to details' option fails to show up
  8. When Details tab shows up, find every entry with Microsoft Edge name in it. Right click on each of them and select End Task to end these entries. Find Microsoft Edge entries and select 'End Task'

Resetting Microsoft Edge browser (Method 2):

If Method 1 failed to help you, you need to use an advanced Edge reset method.

  1. Note: you need to backup your data before using this method.
  2. Find this folder on your computer: C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  3. Select every entry which is saved on it and right click with your mouse. Then Delete option. Go to Microsoft Edge folder on your computer, right-click every entry and click 'Delete'
  4. Click the Start button (Windows logo) and type in window power in Search my stuff line.
  5. Right-click the Windows PowerShell entry and choose Run as administrator. Find Windows PowerShell, right-click it and select 'Run as administrator'
  6. Once Administrator: Windows PowerShell window shows up, paste this command line after PS C:\WINDOWS\system32> and press Enter:
    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register $($_.InstallLocation)\AppXManifest.xml -Verbose}
    Copy and paste a required command and press 'Enter'

Once these steps are finished, “Microsoft Error: Unknown System Failure” pop-up should be removed from your Microsoft Edge browser.

Delete “Microsoft Error: Unknown System Failure” pop-up from Mozilla Firefox (FF)

Use these helping lines to clean the entire Mozilla Firefox browser application as the potentially unwanted program might have left some suspicious objects in it:

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select “Microsoft Error: Unknown System Failure” pop-up and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  4. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete “Microsoft Error: Unknown System Failure” pop-up removal. Click on 'Reset Firefox' button for a couple of times

Uninstall “Microsoft Error: Unknown System Failure” pop-up from Google Chrome

Before resetting your Google Chrome browser, eliminate all extension, toolbars, add-ons and other suspicious content from your browser. Then, perform these actions:

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select “Microsoft Error: Unknown System Failure” pop-up and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  4. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  5. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  6. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  7. Click Reset to confirm this action and complete “Microsoft Error: Unknown System Failure” pop-up removal. Click on 'Reset' button to complete your removal

Remove “Microsoft Error: Unknown System Failure” pop-up from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for “Microsoft Error: Unknown System Failure” pop-up or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  4. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete “Microsoft Error: Unknown System Failure” pop-up removal process. Select all options and click on 'Reset' button

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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