My Norton 360 icon disappears from my taskbar and my Norton 360 window closes when I am going on YouTube video site. If I start a scan it does not interrupt it but I have to click again on the Norton 360 icon on my desktop to bring back the window and the icon in the taskbar. I restarted my computer but I still have the same issue. Repairing Norton did not changed anything too.
I'm using Chrome
This has been happening to me too!
1 Like
I am also having the same issue on Firefox.
Just updated to 26.2.10802 (build 26.2.10802.970) and the same thing happened. Norton taskbar icon disappeared while accessing youtube but on Edge. Opened Norton from desktop shortcut and taskbar icon was restored.
I can confirm thew above issue. While playing you tube videos, Norton keeps crashing.
Error:
Fehlerhafter Anwendungsname: NortonUI.exe, Version: 26.2.10802.1029, Zeitstempel: 0x69b3ecc8
Fehlerhafter Modulname: ucrtbase.dll, Version: 10.0.26100.7623, Zeitstempel: 0x53a0792e
Ausnahmecode: 0xc0000409
Fehleroffset: 0x00000000000a4ace
Fehlerhafte Prozess-ID: 0x3F38
Fehlerhafte Anwendungsstartzeit: 0x1DCB9377774C3B0
Fehlerhafter Anwendungspfad: C:\Program Files\Norton\Suite\NortonUI.exe
Fehlerhafter Modulpfad: C:\WINDOWS\System32\ucrtbase.dll
Berichts-ID: 9b405c76-5e87-4d78-b0b7-4950b822f701
Vollständiger Name des fehlerhaften Pakets:
Fehlerhafte paketbezogene Anwendungs-ID:
My icon also disappears while youtube is active. After staring Norton from the desctop, it is on the taskbar again, if you use YT, its gone again.
Out of curiosity, when the icon disappears, have you checked the hidden icons by clicking on the up arrow to the left of the system tray?
Icon are set to always show all.
I understand the icon is set to always show. But just wondering if it might move to hidden when this issue raises its head.
I just posted in another thread that starting today this issue doesn’t even register anything in event viewer. No errors, warnings or information, The icon disappears and Norton is seeming to log out as soon as a video is played on youtube.
In my situation, the icon disappears entirely and does not appear amongst hidden icons.
This the info I can get regarding those who are getting the exception code0x0000409:
AI Overview
Exception code 0xc0000409 (STATUS_STACK_BUFFER_OVERRUN) is a Windows error indicating an application crashed because it detected a memory buffer overflow, often due to corrupted system files, faulty software updates, or malicious software. It is a “fail-fast” exception, meaning the app terminates immediately to prevent further damage or security issues.
Common Fixes for 0xc0000409:
- Repair Visual C++ Redistributables: Open Control Panel > Programs and Features, select Microsoft Visual C++ entries, click “Change” and then “Repair”.
- Run System File Checker (SFC): Open Command Prompt as administrator, run
sfc /scannowto fix corrupted system files.- Update or Reinstall the Application:
Reinstall the specific program that is crashing, as it may be corrupted.
- Perform a Clean Boot: Start Windows with minimum drivers/programs to rule out software conflicts.
- Run Windows Memory Diagnostic: Type “Windows Memory Diagnostic” in the search bar, select it, and choose to restart to check for RAM issues.
- Reinstall/Update Teams: If it happens with Microsoft Teams, switch between the classic and new Teams versions.
Regarding the file \ucrtbase.dll crashing:
AI Overview
ucrtbase.dllcrashes are commonly caused by corrupted Windows system files, outdated software, or missing Visual C++ Redistributables. Immediate fixes include running
sfc /scannowin Command Prompt, updating graphics drivers, reinstalling the crashing application, and repairing Microsoft Visual C++ redistributables from the Control Panel.[image]Adobe +3
Key Troubleshooting Steps:
- Run System File Checker (SFC): Open Command Prompt as Administrator, type
sfc /scannow, and press Enter to repair corrupted system files.- Reinstall/Repair Visual C++ Redistributables: Download and install the latest supported Visual Studio 2015, 2017, 2019, and 2022 redistributables (both x86 and x64) from the official
- Update Drivers: Update your graphics card drivers, as outdated drivers can trigger
ucrtbase.dllfailures.- Check Application Updates: If a specific application (e.g., Adobe, Autodesk) is crashing, check for updates or reinstall the software.
- Windows Updates: Ensure Windows is fully updated to patch potential OS-level issues.
Faulty process ID: 0x3F38: Is indicative of Nvidia drivers
SA
Hello SoulAsylum, nothing of your enclosed support did work. Norton is again constantly crashing. I have also the problem with 2 laptops without Nvidi drivers. That all started 20.03.2026. Before, everything was fine. I remember, that there was an security update from Norton a few days ago. Could this be the reason of the problems?
Yes I am in concert that the issue may be with that update!! Make zero mistake of that. The larger aspect of the troubleshooting I’m doing is nailing down what may or may not be “specific” regarding drivers, etc. across different hardware.
I keep coming back to the “exception code0x0000409”, because its a fail safe exception that protects the Windows environment. Norton and other 3rd party software take “hooks” from deep within Windows. So you can get a better picture of what Windows hooks are here is some general information for you:
AI Overview
Windows hooks are a mechanism in the Microsoft Windows operating system that allows applications to intercept and process events—such as messages, mouse actions, or keystrokes—before they reach a target application
. They enable developers to monitor or modify system/application behavior, such as handling input, managing dialogs, or creating custom menus.
Key Aspects of Windows Hooks:
- Functionality: Hooks act as callback functions inserted into the message handling mechanism. A hook procedure intercepts specific events (e.g.,
WH_KEYBOARD,WH_MOUSE) before they reach the target application’s message loop. - Types: Hooks can be local (specific to one application) or global (monitoring all applications in the system).
- Use Cases:
- Monitoring: Recording keyboard or mouse input for diagnostic tools.
- Modification: Changing or suppressing messages before they are processed.
- System Customization: Implementing specialized hooks for tools like screen readers or debuggers.
- Implementation: They are implemented by injecting code into the target process or setting a global hook, which requires appropriate system permissions.
Potential Risks:
Because hooks can monitor or alter system-wide input, they are sometimes used for malicious purposes, such as keyloggers, and require careful, responsible implementation.
Because it can also represent either sloppy coding or a malicious process that is where I am aiming this.
SA
Almost certainly deepfake detection is the culprit. Disabling it results in no more crashes/closures when playing videos on youtube.
Hello @Harnok
fwiw ~ my understanding:
A fix has been released for this “YouTube” issue. Users have to Restart their machine and check if it is working.