Windows 7 using a dual boot Conf

Configuring the Default Operating System

When you configure a computer to dual-boot, one of the operating systems is selected as the default. This means that the computer boots into this operating system by default unless the user intervenes to select the other operating system. To change the default operating system using the graphical user interface (GUI), perform the following steps:

1. From the Start menu, open the Control Panel. Select Small Icons from the View By drop-down list.
2. Click System and then click Advanced System Settings. This opens the System Properties dialog box.
3. On the Advanced tab, click Settings in the Startup And Recovery section. This opens the Startup And Recovery dialog box, shown in Figure 1-7.
   
   Figure 1-7: Selecting the default operating system
4. From the Default Operating System drop-down list, select which operating system is booted by default.

To configure the default operating system using the Bcdedit.exe command-line utility, perform the following steps:

1. Open an administrative command prompt by right-clicking Command Prompt in the Accessories folder of the Start menu and choosing Run As Administrator. Click OK when prompted by the User Account Control dialog box.
2. Enter the command bcdedit/enum to view a list of the current boot menu entries, similar to what is displayed in Figure 1-8.
   
   Figure 1-8: Using BCDedit to modify the boot menu
3. To change the default entry, use the command bcdedit/default and then list the identifier. In Figure 1-8, this would be {878f7be0-2163-11de-b92d-d86aaca536b1}.