In the installation of a machine on the WINDOWS7 system, after installation with Ubuntu, the boot will automatically use GRUB2 boot. For users using dual systems, the MBR and GRUB2 are similar, but my machine has three systems, need to use MBR to guide the chameleon, each time in the GRUB2, select Windows7, and then on the MBR guide interface, select the chameleon, so it is very troublesome. The solution is: with the MBR to guide the start of the three systems, in the MBR boot, the default is to enter the WINDWOS7, if you want to change the default to Linux, you can install EASYBCD to adjust.
The following is how to restore the boot by default with MBR boot:
Download the attachment, then unzip it, such as I unzip to the D disk, and then use the Administrator account to open cmd, CD to D disk, and then execute
Mbrfix.exe/drive 0 fixmbr
Here drive 0, is the designated to repair the hard disk, the number can be seen from "Disk Management", only one hard disk is generally drive 0.
Then confirm, you can.
The mbrfix used in the article:
/files/sunjie21/mbrfix.zip
Windows7 Ubuntu dual system using Windows7 MBR boot method