Computer boot error appears unknown filesystem How to solve?

When you have a Linux system or other type of system installed on your computer, the following types of errors may occur when you restart your computer: unknown filesystem. Entering Rescue Mode...grub rescue>

This error prompts the boot file can not be found, at this time by starting a U disk to repair. Of course, can also be used to repair the command, but through the command operation is more complex, the following describes how to start a USB drive to quickly repair boot entry.

1, insert the boot u disk, power-on press the corresponding key to enter the BIOS option, ASUS notebook computer into the BIOS key is F2. After entering the BIOS, set the U disk as the first boot.

2, according to F10 save and the BIOS interface, at this time the computer restarts will automatically enter the boot U disk in the repair system, the following is my launch of the U disk launch interface.

3, into the launch of the USB disk after the system interface as shown in the following figure. The Windows boot repair icon can be found in the following illustration. Almost all of the other types of boot drives have this fix option.

Note: This startup USB drive is made from a computer store. "can refer to use"

4, double click on the image of the Windows boot Repair icon will open the following DOS interface, in the interface to enter the original system location of the disk. My Win7 is installed on the C disk, so enter C.

5, input C after the system will automatically boot file repair, after the successful repair will have the following prompts

6, repair after the successful removal of the boot U disk and restart the computer can be carried out before the system