Do operating system checks the system for viruses?

Operating systems themselves do not inherently check for viruses; this functionality is typically provided by antivirus software. While some operating systems may include basic security features, such as Windows Defender in Windows, these are designed to complement dedicated antivirus programs. Regularly updating the operating system and using antivirus software is essential for effective protection against malware and viruses. Ultimately, the responsibility for virus detection and removal largely falls on third-party security applications.