Win7 system can not go to press F8 and no mode how to do

1, the specific problem is to boot up the following figure:

2, there is this problem, if your computer is not something important, personal advice or reload system, the following say how to do not reload it!

If you have a USB drive, or if you have a system disk

3, if the U disk is to be in the BIOS motherboard settings, set to start the U disk.

WinPE the command prompt tool under the system, and then enter the following DOS command at the cursor position (press ENTER for each DOS command):

4. Orders are:

CD C:windowssystem32

Bcdedit/set {default} osdevice boot

Bcdedit/set {default} device boot

Bcdedit/set {default} Detecthal 1

Effect as shown: