Reference: http://jingyan.baidu.com/article/63acb44ae4062c61fcc17e27.html;
After installing the dual system, we often encounter problems that want to open windows but the default startup item is UBUNTN.
Modifications under Windows System:
EASYBCD, you can modify the name of the startup item, order, etc., or you can add a startup item
UBUNTN System to modify:
1. First boot or restart, in the Boot Item selection menu remember win7 corresponding serial number, from top to bottom sequence number from 0 to count, my win7 system option is 5th, then the serial number should be 4, remember, open Ubuntu system.
2. Open Terminal input: sudo vim/etc/default/grub use gedit here is also possible, see personal habits.
3. Pop up a GRUB file, change the text "grub_default=0" 0 to the Win7 system serial number 4, while you can modify the "grub_timeout=10" in the 10, modify the default wait time, here changed to 5 seconds. When you're done, click "Save" and then close.
4. The above text editor saves only the content modified, but does not update the configuration, also need to input in the terminal: sudo update-grub
modifying system startup items under Linux and Windows dual system