Win7 system can not get in, press F8 and no mode how to do

Generally, when our computer can not enter the normal mode, you can press F8 and then enter safe mode or the last time correctly configured, and Xiaobian appeared Once you press F8 again, there is no response. See how the small series does not reinstall to solve this problem.
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The specific problem is the following picture:

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This problem occurs. If there is something important in your computer, personal recommendation is to reinstall the system. Do not reinstall it!
If you have a USB flash drive, or have a system disk
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If it is a USB flash drive, it must be set on the bios motherboard, set to boot from the USB flash drive.
Command prompt tool under WinPE system; then enter the following DOS command at the position where the cursor is located (press the Enter key for each DOS command):
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The order is: Br>cd c:windowssystem32
bcdedit /set {default} osdevice boot
bcdedit /set {default} device boot
bcdedit /set {default} detecthal 1
The effect is as follows:
< Br> The above is about the win7 system can not get in, press F8 also no mode how to do, Xiaobian can get into the system according to the above.