Some of the files belonging to a Windows user have been lost or renamed. What Event Viewer log file will enable him to know who has recently logged into his PC?

In order to assist you in problem-solving, the Windows Event Viewer utility provides information about what has been happening throughout the entire system. The Event Viewer displays warnings, error messages, and records of successful events. It is available in all current Windows versions. Security (which contains data about logins), System, and Application are the three most commonly referenced logs. You can track successful and unsuccessful access attempts using the Security log. The system log keeps track of system events including drivers being started and programs running in the background. Software and Authentication are not logs in Event Viewer.