Win7 system crashes cannot be repaired and into safe mode how to do?

The specific actions are as follows:

1, the U disk boot disk into the computer USB interface.

PS: There is no U disk Startup disk, you need to do in other normal use of the computer on the U disk to create a U disk Startup disk, you can refer to the pocket peu disk start-up disk production tutorials.

2, press the boot button, quickly press the Keyboard del key or is the F12 key (before the computer into the startup program), into the BIOS setup interface, find the boot column, the option with the word USB is set as the first boot entry, and press F10 Save and exit ( Please refer to the prompt on the BIOS interface for specific buttons as shown in Figure 1:

Figure 1 BIOS setup U disk as first boot disk

PS: Different motherboards to enter the BIOS method may not be the same, while different motherboard BIOS set U disk for the first boot Disk option operation is not the same, the specific motherboard BIOS setup method can be searched in this site. 3. Setup completes the system automatically restarts after exiting, enters the Pocket PE function selection interface, selects "Starts the Pocket U disk Windows8pe Maintenance System" with the keyboard key, and presses the Enter, as shown in Figure 2:

Figure 2 Pocket PE function Selection interface

4. Enter the pocket U disk Windows8pe maintenance System, double-click on the desktop "computer" in the Open Computer window, see if the disk has been reduced, that is, there is no disk symbol disappeared, if not disappear, the hard drive to consider the problem of bad road, if the disappearance of the hard disk necrosis. Second, to determine whether the hard drive bad road 1. Next step, close the Computer window and double-click to open the icon named "Diskgenius" on your desktop, as shown in Figure 3:

Figure 3 Opening Diskgenius

2. In the Open Diskgenius window, select "Hard disk" → In the hard drive Pull-down menu, select "Bad track detection and Repair", as shown in Figure 4:

Figure 4 Selecting "Bad track detection and repair"

3. Then, follow the Diskgenius prompts, step-by-step operation can be. Bad track detection and repair process depending on the size of the hard disk, it may take about 2 hours, you need to wait patiently.

If the final test results are not a problem with the hard drive, then you need to consider whether the installation of the Win7 system is a problem. It's best to reload the system. However, only the choice of disc Reload system and U disk reload system in two ways.