Computer software system failure and maintenance 2

The boot phase of Windows XP consists of four steps. Step 1. The boot loader initialization NTLDR program switches the processor from RealMode to 32-bit planar memory mode (32-bitFlatMemoryMode). In real mode, the first 640KB of memory is reserved for MS-DOS, and the remaining memory is used as extended memory, so that Windows XP will not be able to use all the physical memory. 32-bit planar memory mode allows Windows XP to use all the memory installed on the computer (by design, 32-bit Windows operating systems can only use 2 GB, 64-bit can use 4 GB). Next, NTLDR starts the built-in Micro File System Driver (mini-filesystemdrivers). Through this step, NTLDR can identify each partition formatted with NTFS or FAT file system in order to find and load WindowsXP. This step is not necessary on a single operating system computer. If the computer has more than one operating system installed (that is, multiple operating systems), and boot.ini is set correctly, the computer will display an operating system option, which is the result of NTLDR reading boot.ini. The setting operation steps of the operating system option are "System Properties" → "Advanced" → "Startup and Failure Recovery", as shown in Figure 13.2. Figure 13.2 Operating System Options Device Inquiry Pot Expanding Width Reading Light Short Width Love Ride Free Noodles Due to the clear irony of the machine pith, Silly Ni told Qiangsi's Gujiapu Pond Computer Software System Failure and Maintenance Computer Software System Failure and Maintenance For example, under the root directory of the computer system partition with Windows XP and Windows 2000 installed