Principle of WindowsXP operating system Use system maintenance tool System startup fault repair General method of virus prevention and control Follow the spirit of the coin, He He promoted the memory of the money, pretended to change the wave, bad sensitivity, rust, and long mentioned every person's transmission of remote copy computer software system faults and maintenance Computer software system faults and maintenance 13.1.1 Architecture characteristics of WindowsXP no longer fully supports 16 bit DOS applicationsThe only CMD command window ("Start" → "Run" → "Enter CMD") can only execute some basic DOS commands, which is not supported for most 16 bit applications that directly control hardware.As can be seen from Figure 13.1, Windows XP also introduces user mode and kernel mode to improve the stability of the kernel. When interacting with hardware, it adds a hardware abstraction layer (HAL) to provide abstract hardware access interfaces and avoid direct operation of hardware. These are the main guarantees for the stability of Windows XP.Figure 13.1 The WindowsXP architecture has many advantages and disadvantages. It can be used to solve the problem of computer software system failure and maintenance. Computer software system failure and maintenance (1) KernelMode.When the CPU runs in kernel mode, all programs can run.(2) UserMode.In this mode, the hardware prevents the execution of privileged instructions and checks access operations to memory and I/O space.Allows Windows XP to restrict program access to various I/O operations and catch any behavior that violates system integrity.The number of files in the Windows system folder is large and increases with the increase of software installation.The core system files in Windows XP architecture are shown in Table 13.1.The soft side and regular side of Rouxing Department used to remove the soft side of Sui Zhitian Xu's house storage company's computer software system fault and maintenance computer software system fault and maintenance according to Xing Duixiu's plan. 1. The period between the computer power is pressed and the operating system starts to load the first file in the pre boot stage is called the pre boot stage.At this point, the computer first runs PowerOnSelfTest (POST), which detects the status of hardware devices such as the system's processor and memory.After all hardware devices are automatically identified and configured, BIOS will locate the boot device (such as hard disk or optical drive), and then MBR (MasterBootRecord) will be loaded and run.The NTLDR file of Windows XP will be loaded at the end of the pre boot phase.2. The Windows XP boot phase includes four steps.
