Technology

Windows PCs at risk as new tool disarms built-in security

Published

7 months ago

May 29, 2025

Windows PCs at risk as new tool disarms built-in security

All modern Windows PCs come with Microsoft Defender built in. For the unaware, this tool is Windows’ native antivirus.

Over time, it has matured into a reliable security tool capable of blocking a wide range of threats. However, a tool called Defendnot can shut down Microsoft Defender completely, without exploiting a bug or using malware. It simply convinces Windows that another antivirus is already running.

The implications are serious. This tool does not break into the system or use advanced code injection. It uses Windows features the way they were designed to be used. And that makes the problem harder to detect and harder to fix.

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Windows software on a PC (Kurt “CyberGuy” Knutsson)

The tool works by pretending to be an antivirus

Windows is built to avoid running multiple antivirus products at once. When a third-party antivirus registers itself, Windows disables Microsoft Defender to prevent conflicts. Defendnot exploits this system using an undocumented API that security software uses to communicate with the Windows Security Center.

The tool registers a fake antivirus that appears legitimate to the system. It uses a dummy DLL and injects it into Task Manager, a trusted Windows process. By operating inside this signed process, Defendnot avoids signature checks and permission blocks. Once the fake antivirus is registered, Windows disables Microsoft Defender without warning or confirmation.

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No security alert is shown to the user. No visible changes are made to indicate that the system is unprotected. Unless someone checks manually, the machine remains open to attacks with no real-time protection running.

The tool also includes options to set a custom antivirus name, enable logging and configure automatic startup. It achieves persistence by creating a scheduled task that runs whenever the user logs in.

Windows software on a laptop (Kurt “CyberGuy” Knutsson)

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From GitHub takedown to a fresh build

Defendnot is based on an earlier project called No-Defender. That project used code from an actual antivirus product to fake registration. It gained attention quickly and was removed after a copyright complaint from the vendor whose code had been reused. The developer took the project down and walked away from it.

With Defendnot, the creator rebuilt the core features using original code. This version avoids copyright issues and uses a new method to achieve the same effect. It does not rely on another antivirus or third-party binaries. It was written from scratch to demonstrate how simple it is to manipulate Windows security from inside the system.

Microsoft Defender currently flags the tool as a threat. It detects and quarantines it under the name Win32/Sabsik.FL.!ml. However, the fact that it works at all points to a weakness in how Windows handles antivirus registration and trust.

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Windows laptop showing the home screen (Kurt “CyberGuy” Knutsson)

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6 ways to protect yourself from malicious programs

While Defendnot is a research project, there’s a chance that similar tools are already out there and could be used to compromise your PC. Here are a few tips to help you stay safe:

1. Use strong antivirus software: Even with regular updates, Windows systems can be left exposed by tools like Defendnot that silently disable built-in defenses. A strong third-party antivirus with real-time protection and frequent updates provides essential backup security. Look for solutions with real-time protection and frequent updates to tackle emerging threats. Get my picks for the best 2025 antivirus protection winners for your Windows, Mac, Android and iOS devices.

2. Limit exposure: Many exploits rely on user interaction, such as clicking a shady link, downloading a compromised file or mounting an untrusted virtual disk. Stick to reputable websites, avoid opening unsolicited email attachments and use a browser with built-in security features (like Microsoft Edge or Chrome with Safe Browsing enabled).

3. Avoid running unexpected commands: Never paste or run commands (like PowerShell scripts) you don’t understand or that were copied from random websites. Attackers often trick users into unknowingly running malware this way.

4. Keep your software updated: Regularly update your operating system, browsers and all software applications. Updates often include patches for security vulnerabilities that malware can exploit.

5. Use two-factor authentication (2FA): Enable 2FA on all your accounts. This adds an extra layer of security by requiring a second form of verification, making it harder for attackers to gain access even if they have your password.

6. Invest in personal data removal services: Even with strong device security, your personal information may still be exposed online through data brokers and people-finder sites. These services collect and publish details like your name, address and phone number, making you an easier target for identity theft or phishing. Automated data removal services track down these sites and submit removal requests on your behalf, helping to reduce your digital footprint and increase your online anonymity. While they can’t erase every trace of your information, they make it significantly harder for attackers to find and exploit your personal data, which saves you time and reduces unwanted spam in the process.

While no service promises to remove all your data from the internet, having a removal service is great if you want to constantly monitor and automate the process of removing your information from hundreds of sites continuously over a longer period of time. Check out my top picks for data removal services here.

Get a free scan to find out if your personal information is already out on the web.

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Kurt’s key takeaway

Defendnot points to a bigger issue with how Windows handles security. It takes a feature meant to prevent software conflicts and turns it into a way to completely disable protection. The system assumes any registered antivirus is legitimate, so if attackers can fake that, they get in without much resistance.

We often think of security as blocking the bad and trusting the good. But this case shows what happens when that trust is misplaced. Defendnot doesn’t sneak past Windows defenses. It walks right in using valid credentials. The solution isn’t just more patches or stronger malware signatures. What we need is a smarter way for systems to tell what is actually safe.

Do you think companies like Microsoft need to rethink how Windows handles antivirus registration and trust, given that tools like Defendnot can so easily disable built-in protections without using malware or exploiting a bug? Let us know by writing us at Cyberguy.com/Contact.

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Kurt “CyberGuy” Knutsson is an award-winning tech journalist who has a deep love of technology, gear and gadgets that make life better with his contributions for Fox News & FOX Business beginning mornings on “FOX & Friends.” Got a tech question? Get Kurt’s free CyberGuy Newsletter, share your voice, a story idea or comment at CyberGuy.com.

Technology

The latest iPad Air is $400 for the first time and arrives by Christmas

Published

5 hours ago

December 18, 2025

Press Room

The latest iPad Air is 0 for the first time and arrives by Christmas

If you have $400 and want an iPad, your options are usually kind of limited to either just the base iPad, or better yet, the latest iPad Mini — if it happens to be on sale when you’re shopping (it is now, but that’s not always the case). But right now, you should consider getting the 128GB version of Apple’s 11-inch iPad Air with the capable M3 processor. At Target, multiple colors of this model are $399.99, beating the previous low of $449.99 we’ve seen during large-scale deal events. Currently, no other retailer is matching this price. This sale ends Saturday night.

$400 is a sweet price for this model, as it debuted in early 2025 for $600. In terms of how it stacks up to other iPad models, Verge editor-at-large David Pierce said in his impressions that the M3 Air is “exactly what you think it is. Which is fine.” I know, that sounds like a back-handed compliment, but it’s been a while since iPads peaked in terms of utility, design, and fast performance. This one carries the torch in Apple’s tablet dominance, and its M3 processor means it’ll be a fantastic tablet for longer than any other iPad at the $400 price point. Read our in-depth impressions.

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Technology

Facebook settlement scam emails to avoid now

Published

6 hours ago

December 18, 2025

Press Room

Facebook settlement scam emails to avoid now

NEWYou can now listen to Fox News articles!

Millions of Facebook users filed claims in a recent privacy settlement after the platform was accused of mishandling user data. The approved payouts have been rolling out, which means people are watching their inboxes for updates. Scammers know this and are sending look-alike emails that push you to click a “Redeem Virtual Card” button. Arlene B emailed us to share what landed in her inbox.

“I received an email stating that it was from (Facebook User Privacy Settlement Administrator) and that I needed to click on the button below to “Redeem Virtual Card.” Do you know if this is a scam or not?”

Her question shows how convincing these fake messages appear. A real settlement did happen, and people have been getting payments. Still, criminals are now piggybacking on the rollout with messages that look official but lead to dangerous sites that steal your information. Let’s walk through how to tell real emails from fake ones.

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NEW SCAM SENDS FAKE MICROSOFT 365 LOGIN PAGES

Scammers send fake settlement emails that mimic the real payout notices to trick you into clicking. (Kurt “CyberGuy” Knutsson)

How to check if your Facebook settlement email is legitimate

Scammers rely on confusion and urgency. These steps help you confirm the message before you click anything.

Confirm the sender’s address

Real settlement emails come from facebookuserprivacysettlement@notifications.kroll.com. Kroll is the official administrator.

Look for your claimant ID

Real notices include your unique claimant ID and reference the claim you filed last year. Fake emails skip this personalized detail.

Check where the link leads

Real payout links go to DigitalPay / Veritas or domains tied to krollsettlementadministration. If the link points to a strange or shortened URL, it is likely unsafe.

Watch for common red flags

Pressure to act right away. Clumsy wording or spelling mistakes. A button that goes to a suspicious URL. You never filed a claim in the first place. Any sender address that is not the official Kroll domain.

Remember that you are not required to click anything

If your claim was approved, you have already received a legitimate notice. Emails that say you must “redeem” again or “confirm” payment are signs of a scam.

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A quick hover over the “Redeem Virtual Card” button often reveals a suspicious link that gives the scam away. (Kurt “CyberGuy” Knutsson)

Why scammers target large settlements

Whenever a major payout occurs, criminals blend in with legitimate messages because people expect money and may open emails quickly. When fake notices look similar to real ones, it only takes one careless click for scammers to grab your data.

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A person logging onto Facebook (Kurt “CyberGuy” Knutsson)

Ways to stay safe from settlement scams

Use these simple habits to protect yourself from Facebook settlement scams and any future payout scam.

1) Verify the sender every time

Look at the full address. Scammers often change one character in hopes you will not notice.

2) Hover over links before tapping

Check the destination without clicking. A strange URL is your warning sign.

3) Never share sensitive information through email

Real administrators do not ask for banking info or logins.

4) Use a data removal service

Data brokers often collect your email address, phone number and other personal details that scammers use to target victims. A data removal service can pull you out of those databases, which reduces the amount of scam email that reaches you in the first place.

While no service can guarantee the complete removal of your data from the internet, a data removal service is really a smart choice. They aren’t cheap, and neither is your privacy. These services do all the work for you by actively monitoring and systematically erasing your personal information from hundreds of websites. It’s what gives me peace of mind and has proven to be the most effective way to erase your personal data from the internet. By limiting the information available, you reduce the risk of scammers cross-referencing data from breaches with information they might find on the dark web, making it harder for them to target you.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

5) Go directly to the official settlement site

Type in the address yourself instead of using a link from an email.

6) Use strong antivirus software

Good security software blocks dangerous links and pages. The best way to safeguard yourself from malicious links that install malware, potentially accessing your private information, is to have strong antivirus software installed on all your devices. This protection can also alert you to phishing emails and ransomware scams, keeping your personal information and digital assets safe.

Get my picks for the best 2025 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com.

7) Delete emails that push urgency

Scammers want fast reactions. Slow down and confirm details.

Kurt’s key takeaways

The Facebook settlement payout created the perfect moment for scammers to slip fake messages into inboxes. Once you know the signs, it becomes much easier to separate real notices from dangerous ones. Stay alert, trust your instincts and verify before you click.

Would you open a payout email if you were not expecting money in the first place? Let us know by writing to us at Cyberguy.com.

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Technology

The first Dolby FlexConnect soundbar is coming from LG

Published

17 hours ago

December 17, 2025

Press Room

The first Dolby FlexConnect soundbar is coming from LG

Dolby Atmos FlexConnect technology debuted this year with the TCL Z100 speakers, and now we’re getting our first FlexConnect soundbar thanks to LG. The new H7 soundbar — which runs on the same Alpha 11 Gen 3 chip as LG’s OLEDs and new Micro RGB LED — is a part of the LG Sound Suite, a modular home audio system the company will debut at CES 2026. In addition to the soundbar, the Sound Suite will include the M5 and M7 surround speakers and the W7 subwoofer. All of the speakers feature Peerless Audio components.

The two main drawbacks of TCL’s Dolby FlexConnect implementation were the limitation of only allowing four connected speakers, including a sub, and the need for a 2025 QM series TCL TV. So you needed to pick between better sound coverage with a fourth speaker or more bass performance with a sub. LG’s Sound Suite, on the other hand, will allow you to connect the soundbar with up to four surround speakers and a subwoofer for a potential 13.1.7-channel system.

And while the speakers can be used with a compatible LG TV (including the 2026 premium LG TV lineup and 2025’s C5 and G5 OLEDs), it isn’t required. It’s possible to use the H7 soundbar with any TV — or without — and have it act as what’s called the lead device to connect the surround speakers and sub. LG says there are 27 different speaker configurations possible, from using two speakers as a stereo pair up to the full system with soundbar, surrounds, and sub.

In my experience with the TCL Z100, calibrating FlexConnect speakers to your space is also fast. Once they’re in place and plugged in, a short musical clip is played for a few seconds and then setup is complete. The system is able to know where the speakers are placed and how to optimize the surround and Atmos sound for your room. With other room correction software, the process can take much longer, requiring taking sound readings from multiple locations in the room.

LG is using ultra-wideband technology to adjust the sweet spot based on your listening position that it’s calling Sound Follow. What will be interesting to see with the LG Sound Suite’s Dolby FlexConnect implementation is how customizable it is after setup (for instance, adjusting subwoofer levels).

I’ll be hearing the system at CES and plan on reviewing the system when it’s available to see how well the technology translates into a home.