August 28 2026 FireFox notificatons about viruses

Starting today I am getting dozens of FireFox notifications that say Trojans detected, McAfee expired (which i haven’t had in 30 years) threat detected, etc. I run a Norton scan and it says it found nothing. Then the false notifications show again and again. They say from FireFox via webadvisor.co.in. I go into Windows settings apps and it doesn’t show McAfee Webadvisor app that I could remove.

At another screen Norton shows that it blocked something that was a threat. When I click on details Norton won’t let you take a screen shot of the error message so I can’t send it here or any where else to find a solution. I notice this with other Norton error message. Why don’t they want to use that information to solve the problem?

Anyone know how to get rid of this new Webadvisor spam issue?

Thanks

Ron

.

Note: Please do not post Personally Identifiable Information like email address, personal phone number, physical home address, product key etc.

Issue abstract:

Detailed description:

Product & version number:

OS details:

What is the error message you are seeing?

If you have any supporting screenshots, please add them:

It sounds like you have run up against some malformed ads on a site you are visiting. First thing is to run a full system scan with your Norton 360. Then download and run the free version of Malwarebytes that looks for some things Norton does not check for.

Going forward you can install an ad blocker extension in your browser(s).

1 Like

PeterWeb,

PeterWeb;

I used to use MalwareBytes for a long time along side Norton. A year or so ago MalwareBytes stopped working. I can download a new copy of Malwarebytes and it will install but then won’t open. One of the local computer guys said you can’t run MalwareBytes with Norton. It worked in the past for me so I would like to use MalwareBytes but it won’t load.

By the way, my original problem in this thread about webadvisor notifications taking over my machine went away after 2-3 day but I don’t know why.

Thanks

Ron

Were you using the full paid version of Malwarebytes or the free version? I just use the free version and that is still working for me.

I’ve always used the free version. Since the problem started I downloaded it all over again. It installs but will not launch. attached is the error message I get.

Error when trying to open Malwarebtyes 031926.pdf (203.2 KB)

From your image of the error you are seeing.

AI Overview

Exception code 0xe0434352 is a generic, software-agnostic Windows crash code caused by an unhandled error within a Microsoft .NET application. It simply means a program built on the .NET framework encountered a critical bug or missing dependency and was forced to shut down unexpectedly.

Because this error is tied to the underlying .NET Framework, you can fix it using the troubleshooting methods detailed below.

Repair or Update the .NET Framework

Most occurrences of this error stem from a corrupted or outdated .NET environment.

  • Run the Repair Tool: Download and run the official Microsoft .NET Framework Repair Tool to automatically detect and patch background corruption.

  • Toggle Windows Features: Open your Start Menu, type Turn Windows features on or off, and open the setting. Uncheck the .NET Framework 3.5 and 4.8 boxes, click OK to remove them, reboot your computer, then return to check the boxes again to force a clean re-installation.

  • Update Manually: Download the latest release variant directly from the Microsoft .NET Download Page if you suspect a program requires a newer runtime version.

Fix Corrupted App Configuration Files

If this error occurs consistently with a specific program (such as Autodesk Revit, UiPath, or a strategy game), it is often triggered by a broken local user profile configuration file.)]

  1. Press Windows Key + R, type %LOCALAPPDATA%, and press Enter.

  2. Locate the folder named after the problematic program’s publisher (e.g., Autodesk_Inc or the specific game studio).

  3. Rename the folder by adding _OLD to the end.

  4. Relaunch the application to force it to rebuild fresh, clean configuration files.

Scan for File System Errors

If Windows throws this error during system shutdowns, it usually points to a conflict between a background driver and your system files.

  1. Right-click the Start button and choose Terminal (Admin) or Command Prompt (Admin).

  2. Type sfc /scannow and press Enter to scan your system infrastructure for broken files.

  3. Once finished, type chkdsk /f and press Enter. Approve the prompt to run the scan on your next computer restart, then reboot your machine.

Check the Windows Event Viewer

If the problem persists, you can easily identify the exact culprit application using the built-in system log.

  1. Type Event Viewer into your Windows Search bar and open it.

  2. Navigate to Windows Logs > Application on the left panel.

  3. Look for recent red Error logs containing Application Error or .NET Runtime that match the exact timestamp of your crash.

  4. Read the General description tab below to identify the exact name of the executable file causing the error. Uninstall and completely reinstall that specific program.

I skipped through your message and decided to try this first:

Fix Corrupted App Configuration Files

If this error occurs consistently with a specific program (such as Autodesk Revit, UiPath, or a strategy game), it is often triggered by a broken local user profile configuration file.)]

  1. Press Windows Key + R, type %LOCALAPPDATA%, and press Enter.

  2. Locate the folder named after the problematic program’s publisher (e.g., Autodesk_Inc or the specific game studio).

  3. Rename the folder by adding _OLD to the end.

  4. Relaunch the application to force it to rebuild fresh, clean configuration files.

It solved the Malewarebytes launching problem.

When this started a couple of years ago I went to the community sites for Norton and MaleWarebytes but didn’t get any answers that worked.

peterweb, you made my day

Thanks for posting back. Glad I was able to help.