How to fix Windows/system32/config/System File loss

Start the fault recovery console, create a temporary folder, back up the existing registry file to a new location, delete the Registry file from the current location, and then copy the Registry file from the repair folder to the system32/config folder. After this process is completed, a registry is created. You can use this registry to start Windows XP

Procedure

Insert a Windows XP boot disk into a floppy drive, or insert a Windows XP installation disc into a CD-ROM drive, and then restart your computer.
Follow the prompts and click to select all options required to start the computer from the CD-ROM drive.
"Welcome to installProgramPress R to start the fault recovery console.
If you are using a dual-boot or multi-boot computer, select the installation to be accessed from the fault recovery console.
Follow the prompts and enter the administrator password. If the administrator password is blank, press Enter.
At the command prompt on the Recovery Console, type the following commands and press enter after each line:
MD TMP
Copy C:/Windows/system32/config/system C:/Windows/tmp/system. Bak
Copy C:/Windows/system32/config/software C:/Windows/tmp/software. Bak
Copy C:/Windows/system32/config/sam c:/Windows/tmp/SAM. Bak
Copy C:/Windows/system32/config/Security C:/Windows/tmp/security. Bak
Copy C:/Windows/system32/config/default C:/Windows/tmp/Default. Bak

Delete C:/Windows/system32/config/System
Delete C:/Windows/system32/config/software
Delete C:/Windows/system32/config/SAM
Delete C:/Windows/system32/config/security
Delete C:/Windows/system32/config/Default

Copy C:/Windows/repair/system C:/Windows/system32/config/System
Copy C:/Windows/repair/software C:/Windows/system32/config/software
Copy C:/Windows/repair/sam c:/Windows/system32/config/SAM
Copy C:/Windows/repair/Security C:/Windows/system32/config/security
Copy C:/Windows/repair/default C:/Windows/system32/config/Default

Type exit to exit the Recovery Console. The computer restarts.
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How to enter the console: Put the installation disc and set it to start from the optical drive. After a period of initialization, a prompt is displayed for operation.
Press R to enter the console. Enter the operating system number to enter the corresponding console. At this time, the system will prompt
Enter the password of the administrator account.
Windows/system32/config/system, which is the Registry configuration file of the system. If it is damaged, the system cannot be accessed. The solution is to use the DOS boot disk or go to the System Recovery Console, run the following command: Copy C:/Windows/repair/system C:/Windows/system32/config/System
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Boot with the system installation disk and press "R" to go to the "fault recovery console". If it is an NTFS partition, You need to log in as an administrator.
It must be in the system directory, for example, "C:/Windows"

MD TMP
Copy C:/Windows/system32/config/system C:/Windows/tmp/system. Bak
Delete C:/Windows/system32/config/System
The above three steps only backup your original system information, but they are all damaged. What is the purpose of backup?

Copy C:/Windows/repair/system C:/Windows/system32/config/System
This is the most critical. The repair directory contains the original system information files, copy them to the corrupted file directory and type "exit" to restart. Then you can see the startup logo you want.

However, after entering the system, you need to reinstall all your hardware drivers.