Avoid getting scammed by sites displaying "ERROR # 0x6a4-0xf9fx3999"

Also Known As: ERROR # 0x6a4-0xf9fx3999 tech support scam
Distribution: Low
Damage level: Medium

"ERROR # 0x6a4-0xf9fx3999" scam removal instructions

What is the "ERROR # 0x6a4-0xf9fx3999" scam?

"ERROR # 0x6a4-0xf9fx3999" is a technical support scam, run on various deceptive websites. This scheme has been observed being promoted via Microsoft Azure website-hosting platform. At the time of research, there were two variants of the "ERROR # 0x6a4-0xf9fx3999" scam, text-wise both are practically identical. The scheme is presented as an alert from Microsoft and it claims that users' devices have been infected and if the deceptive page is closed - their computers will be blocked to prevent further damage. It must be emphasized that "ERROR # 0x6a4-0xf9fx3999" is a scam and it is in no way associated with the actual Microsoft Corporation. Typically, sites that promote schemes are accessed through mistyped URLs, redirects caused by intrusive advertisements or by PUAs (Potentially Unwanted Applications). These apps do not need express user permission to be installed onto systems and can have various harmful abilities.

ERROR # 0x6a4-0xf9fx3999 scam

When a webpage promoting "ERROR # 0x6a4-0xf9fx3999" scam is accessed, visitors are presented with a pop-up window. The message therein is disguised as an important alert from Microsoft. It urges users not to ignore the warning and to call the provided toll-free number. Visitors are warned that if this page is closed, their devices will supposedly be blocked to prevent further damage. The computers are allegedly infected with "Storm Worm and Riskware". The nonexistent malware infections are putting users' social media and email account log-ins credentials (i.e. IDs, usernames and passwords), banking account details, and stored images - at risk. The scheme pushes users to call the "helpline" - in order to be instructed on how to eliminate the fake infections. The text presented in the background page simply repeats what is stated in the pop-up. Scammers use this type of schemes variously. They often attempt to gain access to victims' devices, which they then can infect with genuine malware, e.g. with Remote Access Trojan (RATs) to ensure indefinite and stealthy access and control over them, other types of trojans, ransomware, cryptominers, and so on. Cyber criminals also target a variety of sensitive data, such as: content stored on the device, communication (e.g. email, social networking/media, messenger, etc.) and financial (e.g. e-commerce, online money transferring, cryptocurrency, banking, etc.) accounts, names, addresses, credit card details, and so forth. Scammers can obtain this information by tricking victims into revealing it, extracting it from their computers and/or through phishing websites. Furthermore, the "services" offered by scammers are usually extraordinarily expensive. In summary, trusting "ERROR # 0x6a4-0xf9fx3999" and similar scams can result in system infections, financial losses, severe privacy issues and even identity theft. Should it be impossible to close a deceptive site - the Windows Task Manager must be used to end the browser's process. To prevent the website from being reopened next time the browser is open - it is advised not to restore the previous browsing session.

As mentioned in the introduction, deceptive webpages can be accessed via redirects caused by PUAs. Aside from force-opening unreliable and dangerous sites, this software can have other/additional abilities. Adware-types deliver pop-ups, banners, coupons and other intrusive adverts. Once clicked on, the delivered ads redirect to harmful websites and some can even stealthily download/install software (e.g. PUAs). Browser hijackers are another type of unwanted applications, they operate by making modifications to browser settings and restricting/denying access to them - in order to promote fake search engines. What is more, most PUAs spy on users' browsing activity. Information of interest includes: browsing and search engine histories, IP addresses, geolocations and other details. Therefore, to ensure device and user safety - all suspicious applications and browser extensions/plug-ins must be removed without delay.

Threat Summary:
Name ERROR # 0x6a4-0xf9fx3999 tech support scam
Threat Type Phishing, Scam, Social Engineering, Fraud
Fake Claim Scam claims users' devices are infected and may be blocked to prevent further damage
Disguise Microsoft
Tech Support Scammer Phone Number +1-844-311-7591
Symptoms Fake error messages, fake system warnings, pop-up errors, hoax computer scan.
Distribution methods Compromised websites, rogue online pop-up ads, potentially unwanted applications.
Damage Loss of sensitive private information, monetary loss, identity theft, possible malware infections.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
▼ Download Malwarebytes
To use full-featured product, you have to purchase a license for Malwarebytes. 14 days free trial available.

"Activation Failed! (Error Code 001)", "Windows Error Code: DLL011150", "Error Code : EBRX1:6X76D", "Covid19 Warning Alert" - are some examples of other tech support scams. There are thousands of schemes online and they use different techniques to lure victims. Popular scam models include: warnings that the system is infected or at risk, alerts that a crucial piece of software is outdated or missing, fake prize giveaways, unbelievable offers, etc. Regardless of what scams offer, claim, request or demand, the end-goal is the same - to generate profit to the scammers / cyber criminals behind them.

How did potentially unwanted applications install on my computer?

Select PUAs have "official" download pages, which are often promoted by deceptive/scam ones. These applications are also distributed through download/installation setups of other programs. This false marketing technique is called "bundling". Rushed download/installation processes (e.g. ignored terms, skipped steps, used "Quick/Express" settings, etc.) - increase the risk of inadvertently allowing bundled content into the system. Upon being clicked, intrusive ads can execute scripts to download/install PUAs without user consent.

How to avoid installation of potentially unwanted applications?

It is strongly advised to research software before download/installation and/or purchase. All downloads must be done from official and verified sources. Since untrustworthy channels, e.g. unofficial and free file-hosting websites, Peer-to-Peer sharing networks and other third party downloaders - commonly offer bundled and/or harmful content. When downloading/installing, it is recommended to read terms, explore all possible options, use the "Custom/Advanced" settings and opt-out from additional apps, tools, features, etc. It is just as important to exercise caution when browsing. Intrusive adverts appear legitimate, however they redirect to highly questionable webpages (e.g. gambling, pornography, adult-dating, and so on). In case of encounters with such advertisements and/or redirects, the system must be checked and all suspect applications and browser extensions/plug-ins - immediately removed from it. If your computer is already infected with PUAs, we recommend running a scan with Malwarebytes for Windows to automatically eliminate them.

Text presented in the "ERROR # 0x6a4-0xf9fx3999" scam:

Pop-up:

 

** Microsoft Important Alert **

 

ERROR # 0x6a4-0xf9fx3999(3)
Call us immediately at: +1-844-311-7591 .
Don't ignore this alert..
If you close this page, your computer login will be disabled to prevent further damage to our Internet. Your computer has warned us that it has been infected with a Storm Worm and Riskware.

 

The following information is at risk:
 1.Social Media Logins
 2.Bank Account Details
 3.Email Account Logins
 4.Images stored on this computer.
You must contact us now so that our engineers can walk you through the removal process over the phone or via Remote Access to protect your identity and computer. Please call us within the next 1 minute to prevent your computer from being shut down and from any identity theft or information loss.

 

Toll Free:+1-844-311-7591

 

----------------

 

Background page:

 

** MicroSoft Alert **
ERROR # 0x6a4-0xf9fx3999(3)
Please call us immediately at:
+1-844-311-7591 ( Toll Free)
Do not ignore this critical alert.
If you close this page, your computer login will be disabled to prevent further damage to our Internet.
Your computer has warned us that it has been infected with a Storm Worm and Riskware. The following information is being stolen...

 

1.Social Media Logins
2.Bank Account Details
3.Email Account Login
4.Images stored on this computer

 

You must contact us now so that our engineers can walk you through the removal process over the phone or via Remote Access to protect your identity and computer.
Call Windows: +1-844-311-7591 (Toll Free)

Screenshot of the alternative "ERROR # 0x6a4-0xf9fx3999" scam variant:

Another variant of ERROR # 0x6a4-0xf9fx3999 scam

The appearance of "ERROR # 0x6a4-0xf9fx3999" pop-up scam (GIF):

Appearance of ERROR # 0x6a4-0xf9fx3999 scam (gif)

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:

Removal of potentially unwanted applications:

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

Windows XP users:

Accessing Add or Remove Programs in Windows XP

Click Start, choose Settings and click Control Panel. Locate and click Add or Remove Programs.

Windows 10 and Windows 8 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Mac OSX users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

PUAs uninstall via Control Panel

In the uninstall programs window, look for any suspicious/recently-installed applications, select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted application, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove rogue extensions from Internet browsers:

Video showing how to remove potentially unwanted browser add-ons:

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing rogue extensions from Google Chrome step 1

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons and remove them.

Removing rogue extensions from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the error # 0x6a4-0xf9fx3999 tech support scam, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Removing rogue extensions from Mozilla Firefox step 1

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click on "Extensions", in the opened window remove all recently-installed suspicious browser plug-ins.

Removing rogue extensions from Mozilla Firefox step 2

Optional method:

Computer users who have problems with error # 0x6a4-0xf9fx3999 tech support scam removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

removing adware from safari step 1 - accessing preferences

Make sure your Safari browser is active, click Safari menu, and select Preferences....

removing adware from safari step 2 - removing extensions

In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing adware from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.

Removing adware from Microsoft Edge step 2

Optional method:

If you continue to have problems with removal of the error # 0x6a4-0xf9fx3999 tech support scam, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing rogue extensions from Internet Explorer step 1

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".

Removing rogue extensions from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the error # 0x6a4-0xf9fx3999 tech support scam, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Summary:

declining installation of adware while downloading free software sampleCommonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.

Removal assistance:
If you are experiencing problems while trying to remove error # 0x6a4-0xf9fx3999 tech support scam from your computer, please ask for assistance in our malware support forum.

Post a comment:
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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
ERROR # 0x6a4-0xf9fx3999 tech support scam QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of ERROR # 0x6a4-0xf9fx3999 tech support scam on your mobile device.
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