Best virus protection software for windows 10

For Windows 10 specifically, I’d narrow it down to these:

• Bitdefender Total Security — a strong paid option. In AV-TEST’s June 2025 Windows 10 test, it scored 6/6 for protection, performance, and usability. AV-TEST
• Microsoft Defender Antivirus — the best choice if you want free and built-in protection. It also scored 6/6/6 in that Windows 10 test. AV-TEST
• ESET Security Ultimate — another strong paid option, scoring 6/6/6 in the same test. AV-TEST

My practical recommendation

If you want free: use Microsoft Defender and keep Windows fully updated.

If you're willing to pay: Bitdefender Total Security is a very solid choice, particularly if you want additional features beyond basic antivirus.

One important issue, though: Windows 10 itself reached end of support on October 14, 2025. Microsoft no longer provides normal Windows security updates, so antivirus software cannot fully compensate for an unsupported operating system. Microsoft recommends upgrading to Windows 11 or, for eligible PCs, using Extended Security Updates (ESU) through October 2026. Microsoft Support Microsoft

If you tell me your PC's RAM, processor, and whether you want free or paid protection, I can narrow it down to the most suitable option for your computer.