Repair the boot dual boot menu failure of the Win7/win8 dual system

The first situation: first install Win7, and then Win7 under WIN8, this situation result is the Metro's Guide menu.

The consequences:

1, after the boot Win8 is the default system, if you choose win7, you will restart the computer and then enter the Win7;

2, if the win8 crashes, there is no system disk guide, also lead to Win7 system can not enter;

　Reason Analysis:

Appear above the situation, is because win8 inside the introduction of a quick launch of this function, the official said is a part of the system to start the information required to store in a file, the boot directly after the call, which can save a lot of time, but in fact is dormant, So that's why Metro's boot menu appears after the Win8 icon is displayed, instead of appearing before this, because the default quick Start is open, then the boot is not directly read guide, and will first go into the system, if the boot menu placed in the Win8 before the start, then the direct skip, You cannot select the Windows7 operating system to enter.

　　Workaround:

1) method is to repair the Metro menu into a boot on the normal menu, you can use Bcdautofix v1.23 (BCD) or using Win7 bootsect to repair, can be repaired under the WIN8, but the use of the words in the WIN8 may be a false shutdown phenomenon, For example, the power LED is not lit. As long as a simple knock on the keyboard can continue to return to the login interface Oh, so we recommend that you or advanced Win7 system for repair, automatic repair after the completion of the Msconfig command into the system configuration of the "Boot" tab to modify the default system and wait time.

2 After the setup is complete, enter the WIN8 system, then use the Win+x combination shortcut key and right-click to select Run command prompt with administrator privileges;

3 Enter powercfg-h off in the command Prompt window, which is to turn off the quick start, and this is the real shutdown that will display the Win8 icon before the boot menu.

The second situation: first install WIN8 system, then install Win7 system

In this case, the solution is simpler, as long as you set the WIN8 as the default startup item, and then turn off the WIN8 system in the same way as the first case Oh.