The computer system is damaged and can t be turned on, how to reinstall the system?

1. On a Windows system computer that is free of viruses and can access the Internet, make a system installation USB flash drive, steps:

2 **Microsoft's official original Windows system installation image file (the file is in ISO, WIM or ESD format, you can get the ED2K link in "MSDN, I tell you"**)**);

3. Plug in the USB flash drive (capacity requirements: generally win xp needs to have a capacity greater than 1G; win7 and win10 need to be based on the size of the system image file, generally need to have a capacity greater than 4G or 8G);

4 In the disk manager, set the main partition of the USB flash drive (if it does not need to be created first) as the active partition;

5 Start RFUS or Floppy Drive, and write the system installation image file (ISO format) to the U disk in the way of "Write Hard Disk Image" (select FAT32 for the U disk file system); If the target computer is a UEFI+GPT combination, you need to set the UEFI option in the process;

2. On the computer where the system needs to be installed:

1. Plug in the bootable system installation USB flash drive;

2 There are two operation methods to choose from after powering on:

1) Go to the motherboard UEFI BIOS setup screen and set the USB flash drive as the first boot device, then save and reboot (all motherboards do, and older motherboards can only use this method);

2) In the motherboard boot menu, select Boot from USB flash drive (applicable to most mainstream motherboards).

Note: a) Enter the button (or key combination) of the UEFI BIOS settings interface of the motherboard or the boot device selection menu, each motherboard is different, you need to carefully read the prompts on the screen when turning on the motherboard, or consult the motherboard manual to confirm. In addition, some keyboard keys need to be used in conjunction with the FN key or other keys.

b) If the target computer is UEFI boot, you need to select the corresponding UFI boot item of the USB flash drive;

3 Start installing the system, format the partition where you want to install the system when selecting the installation location, and then follow the prompts to continue the installation.

Reasons and solutions for computer not turning on:

Step 1: If the power supply does not respond, then check whether there is a problem with the power supply, poor contact, hardware, etc., and go to the second step, if it is unable to enter the system, it may be an operating system or software problem to go to the third step.

Step 2: Check whether there is a power supply problem, first see if the power supply is not plugged in well or there is a problem with the plug, if you are using a battery, then plug it in and try again. You can go to a friend or go to a computer repair shop or sales store to find the same model of power supply to try it.

After replugging the power supply, press the power button again, and if it still can't be turned on, then press it for a while. If you change someone else's power supply to turn on, it means that there is a problem with the power supply, if it proves that the power supply is fine, it may be the hardware reason, go to the fifth step.

Step 3: Go to the last correct configuration to adjust, turn on and press and hold F8, enter the advanced options page, select "The most recent correct configuration", and press Enter. If it can enter the system, it may be caused by viruses, incompatible hardware drivers with the system, or operating systems.

After entering the system, run the anti-virus software, check and kill the virus, if there is a virus, restart the computer after the anti-virus, if it is not normal, it may be caused by the incompatibility of the device driver and the program, delete the graphics card, network card and other drivers, restart it after removing the driver, if there is still a problem, then go to the next step.

Step 4: Repair and install or reinstall the system, set "Optical Drive as the first boot device" in the BIOS, then insert the system disk, and press the R button to perform "Repair and Installation". If the fault persists, just at the beginning of the system, select "One-click GOST to restore the system" or use the system disk to reinstall the system.

Step 5: Check whether there is a hardware problem, disassemble the notebook to see if the hardware is loose, generally the hardware is not plugged in well, there will be an alarm sound, the long sound continues to sound that the memory module is not plugged in tightly, one long and one short means that the memory or motherboard has a problem, one long and two short means that the graphics card is wrong. If there is too much dust inside the notebook, it is best to clean it up first.

In addition, it is necessary to pay attention to whether it is caused by the newly replaced hardware, if it is normal before the replacement of the hardware, and it is not normal after the replacement, then check whether it is compatible. If it can't be started at this time, it is best to send it for repair, and the professional will check whether there is a problem with the hardware one by one.

First, you need to restart the computer, and then press and hold F8 all the way to enter the computer's advanced boot options, at which point you can choose to start the computer with the most recent correct configuration. Then the system is reinstalled.

U disk reinstallation system methodFirst of all, you need to use software to make a USB flash drive into a boot disk, insert it into a USB flash drive, and then open Xiaobai to reinstall the system with one click (making a boot disk will format the USB flash drive, and the USB flash drive has something that needs to be backed up in advance).

Open the production system options (make boot disk), select the USB flash drive, and click Start Production according to the default parameters. Select a system image, check and click Make, and then wait for the production to be completed, so that the USB flash drive boot disk will be successfully made.

Plug the USB flash drive boot disk into the computer that needs to reinstall the system, restart the computer and press the USB flash drive shortcut key when the first screen appears when it boots up, the shortcut key has a brief prompt on the first screen of the computer boot, and the shortcut key will bring up the shortcut menu, press the arrow key and enter key to select your own USB flash drive name to enter the PE selection interface.