“Microsoft Error: Unknown System Failure” pop-up virus. How to remove? (Uninstall guide)

removal by Olivia Morelli - - | Type: Adware
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The real purpose behind “Microsoft Error: Unknown System Failure” pop-ups

“Microsoft Error: Unknown System Failure" virus

Microsoft Error: Unknown System Failure pop-ups are deceptive notifications that will typically show up on computers infected with adware [1] viruses. However, this Technical Support Scam [2] works independently to adware and only uses these ad-based services to reach potential victims.

Normally, the fraudulent domains will not be listed in the regular web search results and links to them will only show up on some poor reputation websites, lessening the chances of victims coming across them while browsing online.

However, with the help of an adware virus, tech support scammers can redirect users to their malicious sites much easier. If you suspect your device has been infected with adware, you should react quickly, run a system scan with Reimage or similar malware detection utility. By performing Microsoft Error: Unknown System Failure removal, you will diminish the chances of being scammed by this fake alert.

For those who have no security software installed, we have prepared a brief guide how to recognize the fake messages 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 from your PC skip to the end of the article.

Embedding adware on the computer

As we’ve mentioned earlier in the article, in most cases “Microsoft Error: Unknown System Failure” pop-ups are triggered by an ad-based malware hiding on the PC. 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 are software packages.

Malware gets bundled with some popular freeware or shareware application and installs on the computer when Quick or Recommended settings are chosen for the software installation. That is why users typically report “Microsoft Error: Unknown System Failure” hijack after setting up some new software on the computer.

To avoid undesirable programs, you should always choose Advanced or Custom installation modes and deselect additional components manually.

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

In order to remove “Microsoft Error: Unknown System Failure” virus 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 remove “Microsoft Error: Unknown System Failure” pop-up automatically with a help of one of these programs: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus, Malwarebytes Anti Malware. We recommend these applications because they can easily delete 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 uninstall “Microsoft Error: Unknown System Failure” pop-up virus. 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.

More information about this program can be found in Reimage review.

More information about this program can be found in Reimage review.

Manual “Microsoft Error: Unknown System Failure” pop-up virus Removal Guide:

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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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'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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  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'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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  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
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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

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.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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You need to purchase Full version to remove infections.
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  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
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

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You need to purchase Full version to remove infections.
More information about Reimage.

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
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

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

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  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
After uninstalling this potentially unwanted program (PUP) and fixing each of your web browsers, we recommend you to scan your PC system with a reputable anti-spyware. This will help you to get rid of “Microsoft Error: Unknown System Failure” pop-up registry traces and will also identify related parasites or possible malware infections on your computer. For that you can use our top-rated malware remover: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware.

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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