Windows Defender vs. Norton: Which Antivirus Should You Use?

Microsoft Defender Antivirus is free, already installed on your PC, and a reasonable starting point for many people. If you use one Windows computer and stick to well-known sites, Defender may be all you need. However, you can’t manage your protection across devices, and its suite of tools is basic.

Norton requires a subscription, but depending on the plan you choose, it can include cross-device protection, a bundled VPN, scam and deepfake detection, cloud backup, and parental controls. Below, we break down what each option does, what it costs over time, and how to decide which is best for you. For a wider view of the category, see our antivirus hub and our best antivirus software guide.

Where Microsoft Defender Antivirus Falls Short

Defender protects the PC it lives on. To protect phones, tablets, or a Mac, you need other tools. You can opt for Microsoft’s cross-platform Defender app, but it generally requires a Microsoft 365 subscription, so the “free” label no longer applies.

There are also a few gaps that everyday users will notice when compared to Norton 360. Defender has no bundled VPN, no dark web monitoring, and no dedicated scam call or text screening. Family controls and its backup feature also live in separate Microsoft services with their own limits. In our experience, these gaps matter most for people who share devices, shop on public Wi-Fi, or manage accounts for relatives.

What Norton Adds

Norton is a paid suite, and its value depends on which plan you pick. We recommend looking at three tiers.

Norton AntiVirus Plus is the entry point. It costs $29.99 for the first year for one device and renews at $59.99 per year. This plan includes malware and ransomware protection, a firewall, a password manager, and Scam Protection, but it leaves out a VPN and parental controls. Our Norton review walks through its performance.

While that’s an affordable starting point, we recommend Norton 360 Deluxe for most people looking for an upgrade from Microsoft Defender. It covers five devices and includes a VPN, 50 GB of cloud backup, Privacy Monitor, Parental Control, and Dark Web Monitoring. Our Norton 360 review covers our full experience testing it. Also check out our Norton 360 Deluxe vs. Premium comparison to make sure Deluxe is the right Norton plan for you.

Norton Drawbacks

Overall, Norton offers more than Microsoft Defender. That said, there are still a few drawbacks, notably:

• Backup scope: Cloud Backup works on Windows only.
• Parental Control scope: Parental controls do not work on Mac, only on Windows, iOS, and Android.
• Renewal pricing: Most plans renew at a significantly higher rate than the initial term.

Those limits are modest next to the breadth of tools, but they are real.

How the Cost Compares Over Three Years

Price is where Defender wins outright, so we think it deserves a direct look. Defender is free for the full three years. At a minimum, Norton costs about $149.97 over three years if you pay the first-year price once and then renew twice at current rates. Norton 360 Deluxe comes to about $299.97 over the same stretch.

Renewal prices can change, so treat those totals as estimates. Spread across five devices and a bundled VPN, the Deluxe figure is easier to justify. A standalone VPN subscription can cost nearly as much. That said, for one PC with no extras, paying for Norton is harder to defend. If budget is the main driver, our best cheap antivirus list and antivirus cost guide can help you keep costs low.

What Using Each One Feels Like

Defender’s biggest strength in daily use is how little it asks of you. It scans in the background and surfaces alerts through the Windows Security app. You’ll likely never see a pop-up trying to sell you something. Instead, every alert is related to the security of your device. In our hands-on use, the trade-off is that its features are scattered across Windows Security, Edge settings, and separate Microsoft apps.

Norton puts all of its tools in one dashboard. You can check the VPN, backup, firewall, and scam alerts in a single place. However, it runs more components than Defender, so it uses more of your system’s resources. That said, Norton’s gaming plan has a Game Optimizer and Full-Screen Detection Mode that minimize its impact on your system when gaming. Our best antivirus for gaming page covers that use case, and our guide to antivirus scans explains what each scan type does if you want to tune either product.

Can You Run Both Together?

Running two real-time antivirus programs at once is a bad idea, and that applies to Norton and Defender as much as any other pair. Here’s why:

• They compete for the same files. Real-time scanners inspect files as they’re opened, saved, or downloaded. With two running, every file gets scanned twice, which slows down everyday tasks like launching apps, copying files, and installing software.
• They can flag each other. Each program looks for suspicious behavior, and a second scanner hooking deep into the system can look suspicious to the first. That leads to false alarms, quarantined files, and sometimes blocked updates.
• They can cause stability problems. Both tools run at a low level in Windows, so conflicts can show up as freezes, crashes, or a program that stops protecting you without warning.

Windows is built to prevent this. When you install Norton, Windows detects it and switches Defender’s real-time protection to passive mode, so Norton does the active scanning and the two don’t collide. If your Norton subscription lapses or you uninstall it, Defender turns back on automatically, so you’re never left without a safety net.

For the same reason, we advise against stacking a second paid antivirus on top of either one. If you want a second opinion, run an on-demand scan with a separate tool instead of keeping two programs active at the same time.

Which One Should You Choose?

Our conclusion is that the right pick depends on your devices and habits. We recommend sorting yourself into one of the scenarios below:

• Stay with Defender if you use one Windows PC. You keep software updated, avoid pirated downloads, and want zero ongoing cost.
• Choose Norton 360 Deluxe if you cover a mixed household. It protects five devices, including phones and Macs, under one subscription with a VPN and parental controls.
• Choose Norton AntiVirus Plus if you want a step up on one device. You get a firewall, password manager, and scam screening for a modest first-year price.
• Choose Norton 360 Premium if you manage a large family. It covers 10 devices and 100 GB of backup.

Each scenario reflects what we have seen work for different households. If you want to compare other options before deciding, our guides to the best antivirus for multiple devices, Mac antivirus, and Android antivirus are good next stops. You can also read how Norton compares against rivals in our McAfee vs. Norton and Bitdefender vs. Norton comparisons, or browse Norton alternatives.

Bottom Line

Defender is a capable free baseline for a single, carefully used Windows PC. In our assessment, Norton earns its price when you need coverage across several devices, a VPN, scam protection, backup, or family controls in one place. We recommend Defender if your needs are simple and Norton if you want extended protection across your household’s devices.