Win7 dual system startup problem

Although many friends have installed Windows 7, but do not want to give up the original system, the installation of dual systems has become a lot of people's choice. However, there is a problem, that is, the problem of the system boot sequence. After the Windows 7 installation is successful, it sets itself as the default boot. So how do you change the previous Windows version to start the default? Methods as below. After booting the computer into Windows 7, right-click on the "Computer" icon, select "ldquo;" in the shortcut menu that pops up, go to the "System" option, and then click on the left side of the "Advanced System" Set & rdquo;, pop-up "System Properties" dialog box, then click the "Advanced" tab, in the "Startup and Recovery" group click "Settings", pop-up "Startup and Recovery" & rdquo ; dialog box, click the "System Startup" tab's "Default Operating System" item drop-down list, there are two startup items — — & ldquo; earlier versions of Windows & rdquo; & “ Windows 7 & rdquo;, I Select “ an earlier version of Windows”. In addition, the default time to display “ Windows Boot Manager is 30 seconds. If you think it is too long, check the time to display the recovery option when needed, and change the time to 5 seconds. Click “OK> Back to “System Properties” dialog box, then click “OK", click the close button in the upper right corner to exit the settings. Restart after completion, the default option is the earlier version of Windows. Hint: The system boot sequence is invalid in earlier versions of Windows. You must log in to Windows 7 and modify it in Windows 7.