Is Windows Defender Enough to Protect Your Data?

Is Windows Defender the best antivirus program to protect your system from a cyber attack? Maybe not.
Patti Croft, Author
Catherine McNally, Editor
Last updated Jun 6, 2022

With so many potential threats, antivirus software is worth it. When you get a new computer or laptop, you want to know that you have the best antivirus security you can get.

If you purchased a device that uses the Windows 10 or Windows 11 operating system, you got Windows Defender included. That is the antivirus product that comes along as part of the pre-installed Windows package.

But Is Windows Defender the only antivirus product you need? If you want to safeguard your device against the most vicious cyber threats, the answer is no.

While Windows Defender certainly has some fantastic points, it may not give you all the security you need. Keep reading to learn why you may want to go with another option.

In this article
Windows Defender features
Is Windows Defender good?
Where Windows Defender comes up short
5 alternative antivirus programs for Windows 10
Windows Defender FAQs
Bottom line

Windows Defender features

There are some major features you may like with Windows Defender. Some of the options are especially useful if you have young children.

Parents have more control

One of the Windows Defender features parents may like is controlling what their children see. Microsoft has included this to manage the digital features your family can access. It has options you can choose that will keep your devices free from malware and protect your children when they get online.

You won’t get webcam protection with Windows Defender. Many parents and users like to have that included for extra peace of mind.

You get access to research-backed protection

Microsoft has also used in-depth research that helps protect against emerging viral threats. The latest research combines machine learning, data analysis, and cloud infrastructure to protect your devices.

But, if you are like most users, you want a product that runs without you having to check it. Windows Defender must be set up to perform scheduled scans in Windows Task Scheduler.

It may be compatible with other antivirus products

If you want to choose what antivirus software you use, you may be able to have the best of both worlds. Some antivirus products work alongside Windows Defender. The antivirus software manufacturer should show compatibility options for Windows. Microsoft even suggests that you may benefit from added security software while running Windows Defender in passive mode.

If you do install another antivirus software, Windows Defender will go into inactive mode. If you want to run both, you need to turn Windows Defender on again. You can also turn on periodic scanning in the Windows Security settings, under "Virus & threat protection," then "Microsoft Defender Antivirus options." (Also called “Virus & threat protection settings.”)

Defender detects malware files

As part of the Windows Security Suite, you get a built-in malware scanner that searches for any harmful ransomware, spyware, or other malware programs or files on your device. It performs searches across apps, emails, the cloud, and the internet. If a suspicious file gets found, you can quarantine it and review or delete it from your device.

It offers protection from internet hackers

Many hackers work to gain control of your device remotely. Others may send codes to run combinations to guess network passwords. Microsoft offers real-time protection to keep your data safe from intruders. When you suspect a hacker is attempting an attack, you can isolate the device to lock down your data.

Microsoft Defender Firewall comes with the security suite

As an additional layer of protection, you get a firewall that helps keep sneaky hackers from gaining access to your device.

Is Windows Defender good enough?

Yes, Windows Defender is a good basic virus protection software. You may not find everything you want if you are extremely security focused. A third-party antivirus or anti-malware software will likely find threats that Windows Defender may miss.

There are good points about Windows Defender: You get free protection that scores high when tested and reviewed. In a product review by AV-TEST during the first two months of 2022, Windows Defender scored 6 out of 6 on all three evaluations, including a 100% detection rate.

Tests were conducted for usability, protection, and performance. The usability review tested the impact of the antivirus software on the entire computer system and scans for unnecessary website blocking and false alarms. The test for usability showed there was a slight chance of false malware detection when using Windows Defender. That could result in legitimate sites getting blocked.

Protection is where the main points of concern are for most users. During simulated testing, products get reviewed to see how well they guard devices against malicious viral attacks. Solid protection is where Windows Defender shines. In a sample of over 15,000 malware files, a four-week review showed 100% coverage protection. You can configure your Windows security center settings for maximum privacy.

Performance is an issue for anyone using antivirus software. You want to know the product you install doesn’t bog down your machine. Different products can cause the system to run slowly at times. When testing performance, actions get repeated to do a thorough analysis of the average generated speed of the device while using the antivirus product.

When using Windows Defender, expect slower installations of frequently-used applications. How much slower? According to the test, when using a high-end computer, you can expect a download rate that falls at about 16%, which is five percent higher than the industry average of 11%.

Where Microsoft Windows Defender comes up short

If you have read all the features Windows Defender offers, you might think there is no need to install other virus software. Before you decide this is all the protection you need, you should be aware of a few stumbling blocks with the product.

You have to use other Microsoft products for full protection

Getting the most from Windows Defender involves using only Microsoft-based products. If you like to use browsers like Google Chrome or Firefox, you may get less protection. When working with other products, you rely solely on their antivirus protection. Many users aren’t made aware of that before they run into a malware issue.

If you like the Windows Defender parental control features, you should know that your kids also won’t get protected when using other browsers or applications. They must use the Microsoft Edge browser and no others. Also, if you want to extend the Microsoft security features to your children’s Apple or Android phones, it will require a paid subscription.

Windows Defender doesn’t hold up well when accessing phishing sites

Phishing has become a critical problem for many computer users. We get tons of emails each day that look official. When we get in a hurry, we could click on an email before realizing it could be a dangerous scam.

A phishing site works by using a domain name or information that resembles an official website. Phishing sites can cause extensive damage because hackers don’t have to be sophisticated to get private data. Since the sites look genuine, many people give over their personal information. That may include financial and health data, and it can take months to regain that personal data.

Windows Defender blocked phishing sites only 68% of the time when using the Microsoft Edge browser. Firefox and Chrome blocked phishing sites 89% and 90% of the time, respectively.

DNS filtering only when using Microsoft Edge

Windows Defender offers DNS filtering, but you must use the Microsoft Edge web browser to get this feature. DNS filtering uses Domain Name System matches to block malicious websites.

If you prefer to use another browsing method such as Google Chrome or Firefox, you lose the Windows Defender DNS feature. You will need to upgrade to the Endpoint or Business versions to use DNS services with other browsers. The other option is to get the Microsoft Defender Browser Protection browser extension, which helps protect you against online threats when using Chrome.

There’s no password manager

Windows Defender does not come with a password manager. That is a downfall when it comes to protecting your data. A password manager is a tool that generates strong passwords and encrypts them for more online security. Not having a password manager may leave you more vulnerable to internet hackers.

You have to pay extra for cloud backup

You don’t get the advantage of cloud storage with Windows Defender. If you want that, you will need to pay extra for the service. Microsoft recommends using Azure to protect cloud environments.

You don’t get a VPN

Windows Defender will not offer you VPN access for website browsing protection. If you want to use a VPN, you need to sign up for a third-party VPN service to know it will work.

A VPN is an added layer of data protection by using a different IP address and hiding the real one. That keeps hackers from knowing where you are searching from by redirecting your data.

If you are at home doing some internet browsing, you may not want sites tracking your every move. A VPN can guard against others viewing your activity. You don’t want to feel safe at home then realize someone is watching what you do.

5 alternative antivirus programs for Windows 10

If you feel Windows Defender doesn’t offer everything you want in security protection, you have other options. There are free antivirus products and some that require a paid subscription. You can review what each one delivers and its AV-TEST scores to decide what works for your needs.

1. Avast Free AntiVirus

Avast offers protection against malware infections and its Free AntiVirus software comes at no cost to you. Using the AV-TEST product review, it scored 100% when testing the response to malware infections. That protection does come with a slower speed, though. According to the product testing, a high-end PC launched websites 22% slower compared to a 13% industry average.

2. AVG Internet Security

AVG Internet Security is another top performer when it comes to malware protection. It scored 100% against widespread virus attacks using real-world testing scenarios. The website launch performance slowed down dramatically when using AVG. Compared to the industry average of 13%, on a high-end PC, AVG showed a 21% speed reduction when launching popular websites.

3. Bitdefender Internet Security

Bitdefender protects against phishing attacks and other web-based threats. You can also whitelist sites that you want to visit. Whitelisting allows you to visit sites you consider safe. You get to approve internet websites you like to browse, and Bitdefender will remember them for future reference.

In viewing the AV-TEST review, Bitdefender Internet Security has more promise than some of the other antivirus products when testing performance speeds. On a high-end PC, it slowed down popular website launches by 11%, compared to the 13% industry average.

4. McAfee Total Protection

McAfee Total Protection gives users a reason to pay for virus protection. Not only did it offer 100% malware protection in the AV-TEST review, but it also won’t slow down your machine like some of the other antivirus products. Using 51 sample test sites, McAfee Total Protection slowed down a high-end PC by 8%, compared to the 13% industry average.

5. Norton 360

Norton 360 also scored 100% for malware protection in the AV-TEST product review. It did not score as high in the performance section as others. In testing a high-end PC, Norton 360 showed a 13% dip in the website launch speeds compared to the 13% industry average.

Norton 360 does offer Dark Web Monitoring and Parental Control. Parents may especially be concerned about the dark web because it may offer illegal products and services. Some of the content may be harmful because of illicit material and hacking tools.

Why we don't recommend Kaspersky

In early 2022, the Federal Communications Commission (FCC) listed Kaspersky as a "national security risk." Kaspersky Lab is based in Moscow, so this is due to potential threats from Russian-backed cybersecurity threats. With that in mind, we don't recommend using Kaspersky products at this time.

Windows Defender FAQs


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Do I need another antivirus if I have Windows Defender?

Yes, with the security gaps found in Windows Defender, it is advisable to have another antivirus product.


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Can Windows Defender remove Trojans?

Windows Defender cannot remove all Trojans from your device. There may be additional steps you have to take to remove them.

Make sure Windows Defender performs a virus scan. Type “Windows Security” in your search box and choose the “Virus & Threat Protection” option. Select “Full scan” and let it finish scanning the entire device.

You can also install another antivirus software program and run a scan. If you want to stay with the Microsoft ecosystem, you can download the Microsoft Safety Scanner. It is free and updated several times per day to catch the latest viral threats.

You can also run a System Restore that will revert back to a time before your device became infected. You typeRestore” in the start menu and follow the instructions from there.


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Can Windows Defender remove malware?

Yes, when Windows Defender detects malware, it removes it from your device. A caveat to this is Windows Defender must stay updated to catch the newest malware.


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Do you still need antivirus with Windows 10?

Yes, you do need antivirus software protection on Windows 10. Although Windows Defender is a decent basic option, it does not come with everything a paid antivirus software may include. If you are on a tight budget, Windows Defender will work to provide some general security protection, but it is not the optimal solution.


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Is Windows 11 antivirus good enough?

No, Windows 11 antivirus will not protect your device from all potential threats. It may be Microsoft’s most secure version of Windows, but it is not immune to all threats.

Bottom line

When it comes to offering you the best security protection for your device, Windows Defender may be good, but it is not good enough. There are gaps that hackers can use to gain access to your private information.

Windows Defender is good to have since it comes free with Windows 10 and 11, but you need a third-party antivirus software product that is more well-rounded.

Windows Defender has shown some vulnerabilities with malware. No antivirus software can guarantee you 100% security protection, but you can get affordable products that help keep your device safe. Solid antivirus software is an investment in your data privacy.

If your budget won’t allow the cost of a third-party antivirus subscription, there are free products that may work alongside Windows Defender to give you greater antivirus protection for your Windows PC.

You can read more on antivirus protection by checking out the other articles on our site. We update them to show you the latest on antivirus platforms.

Author Details
Patti Croft
Patti Croft has a B.S. in Computer Information Systems and an MBA. She's also a Certified Health Data Analyst through the American Health Information Management Association (AHIMA). Patti worked in Information Technology for 16 years and loves everything tech and gadgets!