So when a program you have installed is infected with a virus or you have a malware which is configured to run at startup, a normal windows update will not remove it.
Does updating Windows 11 Remove virus?
A clean install to a new OS usually eliminates any viruses.
Does Windows 11 have anti virus?
Windows 10 and 11 include Windows Security, which provides the latest antivirus protection. Your device will be actively protected from the moment you start Windows. Windows Security continually scans for malware (malicious software), viruses, and security threats.
Is updating to Windows 11 a good idea?
Windows 11 is worth it for most people. It comes with a wide range of new features, performance improvements, and design changes. As the latest Windows OS, it usually gets more attention than Windows 10, too. There’s not too much risk in upgrading to Windows 11, either.