Win7 system computer boot No bootable device causes and a variety of solutions

win7 system will always encounter some faults, this does not say that the user win7 system boot suddenly found that the computer has No bootable device error, no way to boot. What should I do with this situation? If you have problems with the bootable device in the win7 system computer, you can refer to the following tutorial to solve.

Cause Analysis:

There are many reasons for the No bootable device to boot from the computer. Software or hardware can cause

Solution 1:

1. Restart first, press F2 on the first screen to enter the BIOS system for preliminary check.

2. Look at the Boot option. Generally, booting from the hard disk starts with HDD, and the up and down keys select HDD. Press the F6 key to put the HDD in the first place, F10 save and restart;

3. The restart discovery fails, indicating that there may be a problem with the partition. Use a computer that can be used normally to make a USB flash drive into a booting tool;

4. Insert the USB flash drive into a bad computer and reboot. When you enter the No bootable device error page again, press any key to press any key to continue, you will jump to the U professor winpe interface, select winpe to enter the system;

5, open the DG tool diskgenius, you can see The case of your own computer drive letter. Xiaobian's drive letter at that time only a few 70m garbled, and some drive letters are also called unformatted;

6, this time you will use this tool to rebuild the partition table. Right-click on the first HDD drive letter at the beginning of the left column and select - Rebuild Partition Table. In the middle of the reconstruction, you may click to ignore or reserve. If you see that the drive letter is the correct size, press the reservation. If it is not the correct drive letter, ignore it.

7. After completion, Right-click on the first HDD drive letter at the beginning of the left column and select - Rebuild the master boot record.

8. Finally restart, remember to change the USB boot back to the HDD hard drive before rebooting. There may be two systems for you to choose from, and two of them can successfully enter Windows.

Solution 2:

First of all, according to the prompts, you can conclude that the system boot device is missing. You can start with the following four aspects:

1. Install the system. After the boot mode is not set back to the hard disk boot;

2, if the hard disk boot has been set, it may be the file used to boot the boot system is lost or damaged;

3, the hard disk is not inserted This possibility is relatively small, but it can not be ignored;

4, the worst case is that the hard disk is broken.
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The above is the reason for the No bootable device on the win7 system computer boot and the introduction of all the solutions. If you encounter the same problem, please refer to the above tutorial.