The reverse installation of the operating system is also simple _ registration form

Now the mainstream brand in the market installed operating system is generally Windows XP, but some users may still have Windows 98, Windows Me or Windows 2000, such as operating system, hope that without destroying the original operating system, the premise, Install the above operating system again. As a rule, if you don't use third party software, when installing Microsoft's Windows family of operating systems, it should be installed in sequence from a low version to a high version, and if the use of Third-party software, it will involve the use of software copyright and usage issues, for the general user is obviously not appropriate. In fact, according to the method we provide in this article, no Third-party software can also achieve the operating system to reverse dress, and very simple! For example, my Lenovo brand machine, the C-section of hard disk installation Windows XP Home Edition, c zone file format is FAT 32, other partitions of the file system is FAT 32. File systems that use this article to install the Windows 98,c Zone and install Windows 98 partitions need to be converted to fat 32, or third party startup software is required. Of course, if the file format is NTFS, we can use the "Partition Magic" software to convert it to fat 32. Preparation: Windows 98/me boot Floppy disk that supports CD-ROM startup, DEBUG.EXE files (can be copied from the Windows\Command folder to the boot floppy disk or extracted from Ebd.cab). Step: The first part:
Install the Windows 98/me operating system 1. Place the installation CD-ROM of the Windows 98/me into the optical drive; 2. Use a prepared Startup disk to start the computer; 3. Install the operating system according to the normal installation of Windows 98/me; just don't leave Windows 98/ Me installed in the partition where Windows XP is located; 4. When installed, boot the computer to the Windows 98/me operating system. Part II:
Modify the Bootsect. DOS "File
After you install the Windows 98/me operating system as described above, you will modify the startup files necessary for Windows XP, and we need to bootsect. DOS file is modified to repair its startup file. 1. Open Notepad or other text editing software to make "READ." SCR (the file name can be changed) as follows:
L 100 2 0 1
N C:\BOOTSECT. Dos
R BX
0
R CX
200
W
Q 2. Copy the above made files to the startup disk; 3. Start the computer with the boot disk to DOS; 4. Modify the Bootsect. DOS "File properties, use the following command:
ATTRIB C:\BOOTSECT. Dos-s-h-r 5. At the command prompt, enter: DEBUG

Part III:
Repair Windows XP 1. Modify the boot option in the BIOS to enable the computer to boot from the CD drive, or use the startup disk just made to start the computer, and then enter F:\i386\winnnt.exe (f for the drive letter of the CD-ROM) at the command prompt to run the installation instruction; 2. When installing Windows XP, we will select the repair item to repair the installed operating system on the hard drive; 3. Select the operating system that you want to log on to, typically "1", type "1" and enter the Administrator password (set when installed, install Windows XP family version of Lenovo brand users only need to press ENTER; 4. At the command prompt, type "FIXBOOT" to repair the Windows XP startup file, 5. Take out the Windows XP installation CD in the CD drive, reboot the computer, and modify the startup options in the BIOS. Set it to boot from the hard disk. Now you can see the Windows XP Startup menu and choose the operating system you want to enter. After restarting the computer, we can select the operating system that needs to be started. Is it simple? Part IV:
Install Win2000 under WinXP

After you install Windows XP, it is much simpler to install Windows 2000 than install 98 or me. The method described in this article also does not use Third-party software, and can be operated on FAT32 or NTFS file formats. 1. First, open the "Control Panel", select Folder Options and double-click, select View in the Folder Options window, and remove "√" before "Hide protected operating system files" in the Advanced settings to display the two system files we need: "NTLDR" and "Ntdetect." COM "; 2. Copy the above two files to a floppy disk; 3. Modify the boot options in the BIOS to start the computer from the CD and run Windows 2000 installation procedures; 4. Install Windows 2000 in the normal way; When Setup is complete, start the computer to Windows 2000.6. Copy the above two files we copied to the floppy disk to the C section root directory, and if the system prompts cannot be copied, the user needs to modify the properties of the above two files and remove their "read Only" and "Hide" properties. Description: We do this here because of the win XP version of "NTLDR" and "Ntdetect." COM "supports starting Windows 2000, but the latter does not support booting to the former, so we need to do this."