1. Log in to the Linux system as root;
2, start the terminal, enter the command: vi/boot/grub/grub.conf, the file content is as follows:
#boot =/DEV/SDA
Default=0 (default startup of which system is set, the Linux system is started by default)
Timeout=5 (in the process of starting the system, waiting for the length < units: seconds, so that users can manually select the boot system)
Title CentOs 6.3 Linux as
......
Title Windows 7
......
Title Other ...
......
(each title represents a system, the system code starting from 0, to start Windows 7 by default, set Default=1 )
After the modification, save the file, restart the system, you can enter the Windows system.
PS: If you want to adjust the system order in grub and add a delete system name, modify the title in the grub.conf file.
Linux and Windows dual system setup default boot System