Windows 10's version of Windows Defender comes with virus scanning and removal capabilities; AVG Antivirus Free is a popular antivirus suite that scores well in tests. Bitdefender Antivirus Free Edition and Panda Free Antivirus are other free options to consider.
Windows Defender provides a number of security programs including a firewall, and Windows 10's version also comes with virus scanning and removal capabilities. Users can set it to automatically scan the computer overnight or another time when they're away from the computer. In addition, users can disable the program when installing another antivirus program if they want to run another tool.
AVG Antivirus Free rates well and offers a number of features common to paid antivirus options. The program scores well in many industry tests, besting some paid options, and provides features for checking websites in real time. AVG Antivirus also offers free updates to handle new threats.
Bitdefender Antivirus Free Edition also provides free updates and scores well, according to industry metrics. Although it doesn't offer as many features as AVG Antivirus Free, it takes up minimal memory and performs scans quickly. Another popular option is Panda Free Antivirus, which offers robust protection against viruses and protection against a hosts of other potential threats, including phishing attacks and rootkits.