Antivirus Comparison: Compare Windows PC Security Features
A clear, independent look at what different types of antivirus protection include, so you can choose what fits your PC and budget.
Advertising & independence disclosure: MyPCGuide is an independent information site. We do not sell security software and this page does not scan your computer. If we ever add links to security vendors, we will mark them clearly as sponsored or affiliate links, and they will not change our explanations. Features, prices and test results change, so confirm details on each vendor's official website before buying.
Feature comparison by type of protection
Rather than rank brands, this table compares the main categories of protection. Items marked "Varies" depend on the specific product, so always check the vendor's current feature list.
| Feature | Built-in Windows Security | Free third-party antivirus | Paid antivirus | Internet security suite |
|---|---|---|---|---|
| Real-time malware protection | Yes | Yes | Yes | Yes |
| Ransomware protection (controlled folder access or similar) | Yes (must be turned on) | Varies | Usually | Usually |
| Web and phishing protection | Yes (Edge; extension for other browsers) | Varies | Usually | Yes |
| Built-in firewall management | Yes | Rarely | Varies | Usually |
| Password manager | No (Edge has basic saved passwords) | Rarely | Sometimes | Often |
| VPN | No | Limited, if offered | Sometimes | Often (data limits may apply) |
| Parental controls | Yes (Microsoft Family Safety) | Rarely | Sometimes | Often |
| Identity or dark-web monitoring | No | No | Sometimes | Often |
| Typical cost | Included with Windows | Free | Paid, per device per year | Paid, multi-device plans |
| Customer support | Microsoft support pages | Mostly self-help | Included | Included |
| Best suited to | Most everyday users who follow safe habits | Users who want an extra interface at no cost | Users who want extra layers on one or two PCs | Households wanting one plan for many devices |
What each feature does
Real-time protection
Watches files and programs as they open and blocks known threats before they run.
Ransomware safeguards
Limits unauthorised changes to protected folders so malicious programs cannot easily lock your files.
Web and phishing protection
Warns you about dangerous or fake sites before you enter passwords or payment details.
Firewall
Controls which programs can send and receive data over your network connection.
Password manager
Creates and stores unique passwords so you do not reuse them across accounts.
VPN
Encrypts your connection on public Wi-Fi. It does not replace antivirus and does not make you anonymous.
Parental controls
Helps families manage screen time, content filters and app access for children.
Performance impact
Check independent test results for how a product affects everyday speed on typical PCs.
Which option might suit you?
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How to compare any antivirus fairly
- Check independent test results. Labs such as AV-TEST, AV-Comparatives and SE Labs publish regular protection and performance results.
- List the features you will use. Pay only for extras you need.
- Read the renewal price. First-year discounts often end.
- Read the privacy policy. Understand what data the product collects.
- Download only from the official website. Type the address yourself, and avoid downloads from ads, pop-ups or file-sharing sites.
- Keep one real-time product active and keep Windows and your apps updated.
Antivirus is only one layer
No security product catches everything. Combine it with automatic updates, unique passwords with two-step verification, careful attention to phishing, and regular backups. Read our complete PC malware protection guide.
Frequently asked questions
Do I need antivirus software on Windows 11?
Windows includes Microsoft Defender Antivirus, which is turned on by default. Many people are well served by it combined with updates, careful downloads and good backups. Some people choose a third-party product for extra features such as a password manager or multi-device coverage.
Is free antivirus good enough?
Free tools can provide solid core protection. Paid plans usually add extras such as a VPN, identity monitoring, parental controls or support. Compare the specific features you will actually use.
Can I run two antivirus programs at once?
It is generally best to run only one real-time antivirus product. Two can conflict and slow your PC. Windows Security normally turns itself down when it detects another product that it recognises.
How do I compare products fairly?
Look at recent results from independent testing labs such as AV-TEST, AV-Comparatives and SE Labs, read the vendor's current feature list and privacy policy, and check the renewal price, not only the first-year offer.
What should I do if I think my PC has a virus?
Disconnect from the internet, run a full scan with your security software (and a Microsoft Defender Offline scan if available), then change important passwords from another trusted device. Our malware protection guide has the full checklist.
Are pop-ups saying my PC is infected real?
Usually not. Websites cannot scan your computer from a browser tab. Close the tab or browser and do not call numbers or install software promoted by such a page.