Persistent Popup Claiming Microsoft Defender Subscription is a Scam Won’t Disappear

Title: Troubleshooting a Persistent Microsoft Defender Subscription Scam Popup

In recent weeks, many users have reported encountering a vexing Microsoft Defender subscription scam popup that refuses to disappear from their systems. If you find yourself in a similar situation, you’re not alone—this issue has been a source of frustration for many.

Recently, one user shared their experience with an alarming popup that claims their Windows Defender antivirus has been upgraded to a “Pro plan” at a steep price of $299.00, set to charge their credit card soon. Despite knowing it’s a scam, they worried about potential security breaches on their device and sought solutions to eliminate this persistent nuisance.

To tackle this problem, the user took the essential first steps by running various scans with Microsoft Defender, including quick and full scans, as well as an offline scan. Unfortunately, none of these measures seemed to resolve the issue, and the popup continues to appear regularly.

A noteworthy detail that emerged during their investigations was the presence of a file named conhost.exe in the system32 folder. While a quick search revealed that conhost.exe is typically a legitimate Windows process, its unusual activity in conjunction with the popup raised concerns. Specifically, it seems to be launching through PowerShell every time the intrusive ad appears, which only adds to the unease.

So, what can you do if you are facing a similar issue? Here are some potential steps to consider:

  1. Run a Complete Malware Scan: In addition to Microsoft Defender, consider using trusted malware removal tools like Malwarebytes or AdwCleaner. These can help identify and clear up any hidden threats.

  2. Update All Software: Ensure that your operating system and all security software are up to date. This can help fix any vulnerabilities that might be exploited by malware.

  3. Check Startup Programs: Review your list of startup applications in Task Manager. If anything seems unfamiliar or suspicious, you may want to disable it to see if that stops the popup.

  4. Clear Browser Data: Although you’ve removed your browsers, make sure to clear any left-over data or profiles that might still be lingering on your device.

  5. Consult Professional Help: If the problem persists, consider reaching out to a professional technician who can conduct a thorough analysis of your system.

  6. Backup Important Data: Always ensure your essential files are backed up before proceeding with significant changes to your system.

Remember, staying vigilant and informed can go a long way in safeguarding your

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One Comment

  1. Thank you for sharing your detailed experience with this persistent scam popup. It appears that the converging activity of conhost.exe along with PowerShell suggests potential malware or unwanted scripts running in the background. Here’s what I recommend you try:

    • Run a comprehensive malware scan using reputable tools such as Malwarebytes or AdwCleaner in addition to Microsoft Defender. These tools are specifically designed to detect and remove deeply embedded threats that standard scans might miss.
    • Check your startup programs by opening Task Manager (Ctrl + Shift + Esc) and navigating to the Startup tab. Disable unfamiliar or suspicious entries, especially any related to PowerShell or unknown processes that start automatically.
    • Inspect scheduled tasks via Task Scheduler for any recurring jobs that might be launching malicious scripts. Remove or disable suspicious tasks carefully.
    • Review network activity using Resource Monitor or a packet capture tool to identify any unusual outbound connections, which could indicate ongoing malicious activity.
    • Consider manual file cleanup. Verify the location and properties of conhost.exe—though it’s typically legitimate, malware sometimes disguises itself as. If you find suspicious behavior, you may need to replace or quarantine it.
    • Reset browser settings and clear cache/data to eliminate

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