New win7 function: How to know if someone else has used your computer

If you know whether someone else has used your computer, start Windows 7 first, enter the Edit Group in the search bar, and immediately find the Edit Group Policy. Then, click to start the Edit Group Policy. Expand the computer configuration/management template, Windows component, and Windows logon options in the tree list on the left of the Group Policy in turn, and double-click the right to display information about previous logins during user logon, the dialog box about previous logon information is displayed during user logon. The default status is not configured. Select the Enable ticket option and click OK. Click the close button in the upper-right corner of the window to exit the Edit Group Policy and restart the computer. The system will prompt the last logon status before entering the system desktop, including whether the logon is successful, and detailed Logon Time. In the future, it will be clear if anyone uses your computer.