Severity scale:  
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“ISP HAS BLOCKED YOUR PC” scam. How to remove? (Uninstall guide)

removal by Alice Woods - - | Type: Malware

“ISP HAS BLOCKED YOUR PC” technical support scam can freeze your browser

Screenshot of “ISP HAS BLOCKED YOUR PC” scam

“ISP HAS BLOCKED YOUR PC” is a pop-up that pretends to be legit Microsoft security alert. However, it’s another scammers' attempt to trick users into calling fake tech support line. What is worse, this time crooks use advanced technology that makes the browser unresponsive.

Once “ISP HAS BLOCKED YOUR PC” scam was detected it was thought that it targets Google Chrome users only. However, further investigation has shown that Firefox and Brave can get hacked too.[1]

The significant feature of the “ISP HAS BLOCKED YOUR PC” virus is that it exploits browser vulnerability and might freeze it within 10 seconds. When users are redirected to a malicious website, it not only delivers a fake security pop-up but starts downloading and saving files on the computer.

The latter activity can only be noticed when using a powerful computer. However, the majority of users cannot notice it. However, the affected browser freezes due to thousands of downloads being saved on their devices and high CPU usage which can be seen in the Task Manager.

Therefore, users can get terrified and believe that their devices are infected for real. They cannot close nor browser’s tab neither the browser itself normally. Hence, they only see this scary message:

YOUR ISP HAS BLOCKED YOUR PC. ***

Error # 268D3
Call Microsoft immediately at: +1-888-876-8163
Do not ignore this critical alert.
If you close this page, your PC access will be disabled to prevent further damage to our network.

Your PC has alerted us that it has been infected with a virus and spyware. The following information is being stolen…

Facebook Login
> Credit Card Detail
> Your ISP Account Login
> Photos stored on this PC.
You must contact us immediately so that our engineers can walk you through the removal process over the phone. Please call Microsoft within the next 5 minutes to prevent your PC from being disabled.

Call Microsoft: +1-888-876-8163

The content of the message almost identical to “Microsoft Corporation HAS BLOCKED YOUR PC” scam which was detected in autumn 2017. Crooks use the same non-existent Error # 268D3[2] and provide a phone number that does not belong to Microsoft.

We want to remind that calling the number will cause you more problems than a frozen browser, such as:

  • Trick you into buying security software which is supposed to clean viruses from the computer. However, this trickery might be used to get your credit card information or download malware to your PC.
  • Convince you into installing remote access tool and let “technicians” solve the problem easier. In this way, scammers get full access to your computer and can do whatever they want. Hence, your privacy and device are put at tremendous risk.

Redirects to “ISP HAS BLOCKED YOUR PC” tech support scam website are often triggered by other compromised or high-risk websites, such as gaming, gambling, illegal video streaming or adult entertainment sites. However, adware might force you to visit this site too.

In case of adware infiltration, you should remove “ISP HAS BLOCKED YOUR PC” malware from the system using anti-malware software. Tools like Reimage can quickly detect and eliminate this cyber threat easily.

However, “ISP HAS BLOCKED YOUR PC” removal also requires force-quitting the browser. There’s no other way to close the unresponsive web browser.

Scammers can reach potential victims who browse through insecure websites

Usually, “ISP HAS BLOCKED YOUR PC” ads appear when users browse through websites that are marked as potentially dangerous. We have mentioned that among those sites are online games, streaming or download sites. Thus, it’s recommended to avoid visiting them.

Security specialists from losvirus.es[3] also remind to be careful with freeware downloads because they might include potentially unwanted programs (PUPs). Thus, if you install software using Quick/Recommended settings, you might let adware into the system, because they do not reveal about “additional downloads.”

To avoid infiltration of undesired apps, you have to rely on Advanced/Custom settings and monitor each of the installation steps. You have to unmark pre-selected downloads to avoid computer infections.

How to get rid of “ISP HAS BLOCKED YOUR PC” scam

If your browser was locked by this cyber threat, you have to force-quit the browser to remove “ISP HAS BLOCKED YOUR PC.” In order to do so, you have to hit CTRL + ALT + DEL on Windows keyboard to open Task Manager. Then quit all the processes related to the affected web browser.

If you suspect that your PC was infected with adware or you have called fake support service and downloaded their asked tools, you should opt for automatic “ISP HAS BLOCKED YOUR PC” removal too and scanning the system with reputable anti-malware.

You can remove virus damage automatically with a help of one of these programs: Reimage, Malwarebytes MalwarebytesCombo Cleaner, Plumbytes Anti-MalwareMalwarebytes 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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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
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 Malwarebytes.
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 “ISP HAS BLOCKED YOUR PC” scam, follow these steps:

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of “ISP HAS BLOCKED YOUR PC” scam from Windows systems

In order to get rid of “ISP HAS BLOCKED YOUR PC” pop-up, you have to press Ctrl + Alt + Del to run Windows Task Manager. In the running processes, find the ones that belong to your Chrome, Firefox or Brave web browser (or another browser which was infected) and terminate them.

Then, check the system for adware or malware. The instructions below will help you to wipe out this cyber threat. However, you should not forget taking care of affected browsers too.

  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 “ISP HAS BLOCKED YOUR PC” scam and related programs
    Here, look for “ISP HAS BLOCKED YOUR PC” scam 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

Delete “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam 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

Uninstall “ISP HAS BLOCKED YOUR PC” scam from Internet Explorer (IE)

  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 “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam 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

Eliminate “ISP HAS BLOCKED YOUR PC” scam from Microsoft Edge

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, “ISP HAS BLOCKED YOUR PC” scam should be removed from your Microsoft Edge browser.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase “ISP HAS BLOCKED YOUR PC” scam from Mozilla Firefox (FF)

Follow these steps to recover Mozilla Firefox after the “ISP HAS BLOCKED YOUR PC” hijack:

  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 “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam removal. Click on 'Reset Firefox' button for a couple of times
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Remove “ISP HAS BLOCKED YOUR PC” scam from Google Chrome

Look up for suspicious Chrome extensions and reset the browser as shown below:

  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 “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam removal. Click on 'Reset' button to complete your removal
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam 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 “ISP HAS BLOCKED YOUR PC” scam removal process. Select all options and click on 'Reset' button

About the author

Alice Woods
Alice Woods - Likes to teach users about virus prevention

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