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About “Trojan Spyware Alert – Error Code: #0x898778” pop-up scam

Quick answer

What to do about About “Trojan Spyware Alert – Error Code: #0x898778”

Short answer: About “Trojan Spyware Alert – Error Code: #0x898778” is usually a browser pop-up, redirect, or notification-permission problem rather than a normal system message.

Start here: close the tab, do not press Allow, remove the site from browser notifications, and check recent extensions if it returns.

Need browser steps? Use our browser notification scam removal guide for Chrome, Edge, Firefox, Safari, and Android.



The “Trojan Spyware Alert – Error Code: #0x898778” alerts are a social engineering assault that places your web browser on full screen and display alers that won’t go away, essentially locking your internet browser. These fake error messages aim to trick you into calling a shown technical assistance hotline. If you call these “support service”, they can provide fake solutions for your “troubles” as well as ask for payment in the kind of a single charge or subscription to a purported assistance solution.

These “Trojan Spyware Alert – Error Code: #0x898778” alerts are nothing greater than a scam. Don’t call the number in the pop-ups. Microsoft’s error as well as cautioning messages never ever consist of a phone number.

Microsoft does not send out unwanted email messages or make unsolicited phone calls to demand individual or payment info or fix your computer. Deal with all unwanted telephone call or pop-ups with hesitation. Do not give any individual information.

Your web browser might be redirected to the websites that display the “Trojan Spyware Alert – Error Code: #0x898778” fake error messages either by malicious advertisements on the websites you check out or adware. When it comes via adware, these harmful programs are packed with various other cost-free software application that you download of the Web. Unfortunately, some free downloads do not effectively disclose that software program will additionally be installed and also you may find that you have installed adware without understanding.

The “Trojan Spyware Alert – Error Code: #0x898778” fake error messages is displayed in such a way regarding trick the user right into assuming their system has actually collapsed or that a virus has been found on the system. It does this to try as well as scare the infected user right into calling among the noted phone number in order to obtain support. In truth, however, they will just be greeted with people that are attempting to sell them unneeded assistance contracts and also solutions.

The “Trojan Spyware Alert – Error Code: #0x898778” fake error messages will certainly look like this:

What is Trojan Spyware Alert - Error Code: #0x898778?

The scammer will usually try to get the victim to enable remote access to their computer. After remote access is gotten, the scammer relies on confidence methods typically including energies built right into Windows and also various other software in order to get the target’s depend pay for the supposed “assistance” solutions, when the scammer in fact steals the sufferer’s bank card account information.

Remove “Trojan Spyware Alert – Error Code: #0x898778” pop-ups automatically:

The easiest method to stop “Trojan Spyware Alert – Error Code: #0x898778” pop-ups is to run an anti-malware program capable of detecting adware in general. You may try GridinSoft Anti-Malware. It’s good at detecting and removing adware and other PUPs (potentially unwanted programs).


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Other software that may be able to get rid of Trojan Spyware Alert – Error Code: #0x898778:

You can also try to remove “Trojan Spyware Alert – Error Code: #0x898778” by hand using the following instructions.

Uninstall the suspicious programs from Windows

Go to Programs and Features, uninstall suspicious programs, programs you don’t remember installing, or programs you installed just before “Trojan Spyware Alert – Error Code: #0x898778” pop-ups appeared on your browser for the first time. When you are not sure if a program is safe, look for the answer on the Internet.

Windows 11:

  1. Right-click the Start button and select Installed apps.
  2. Sort apps by install date and look for suspicious programs.
  3. Click the three dots button next to the unwanted app and select Uninstall.
  4. Restart the PC.

Windows 10:

  1. Right-click the Start button and select Apps and Features.
  2. Sort apps by install date and look for suspicious programs.
  3. Select the unwanted app and click Uninstall.
  4. Restart Windows.

Reset the browser settings to remove “Trojan Spyware Alert – Error Code: #0x898778” pop-ups:

Remove suspicious browser extensions you do not recognize. You can also reset browser settings with GridinSoft Anti-Malware:

Remove “Trojan Spyware Alert – Error Code: #0x898778” pop-ups from Google Chrome:

  1. Click on three dots menu button three dots menu at the top right corner of the window.
  2. Select More toolsExtensions.
  3. Click REMOVE to uninstall an extension.
  4. Click Remove in the dialog box.

Remove “Trojan Spyware Alert – Error Code: #0x898778” pop-ups from Mozilla Firefox:

  1. Click on menu button Menu button and select Add-ons.
  2. Go to Extensions tab.
  3. To uninstall an add-on, click on Remove button next to it.

Remove "Trojan Spyware Alert – Error Code: #0x898778" pop-ups from Microsoft Edge:

  1. Open edge://extensions/ in the address bar.
  2. Turn off or remove extensions you do not recognize.
  3. Open edge://settings/content/notifications.
  4. Remove "Trojan Spyware Alert – Error Code: #0x898778" pop-ups and other suspicious sites from the Allow list.
  5. If redirects continue, open edge://settings/reset and use Restore settings to their default values.

Remove “Trojan Spyware Alert – Error Code: #0x898778” pop-ups from Opera:

  1. Press Ctrl +Shift + E keys to open extensions manager.
  2. To remove an add-on, click on the x button next to it.
  3. Click OK when asked to confirm.

Daniel Zimmermann

Daniel Zimmermann has been writing about adware, browser notification abuse, unwanted programs and practical Windows cleanup for many years. He focuses on clear removal steps for everyday users and keeps Adware Guru guides grounded in observable browser symptoms.

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