Suppose your Windows XP is installed in the C drive, you want to install the Windows 2000 to D disk, then just run the installer with Windows 2000, you can run the installer and install it to the D disk, but then this is installed after the double boot menu will Failure, can only go to Windows 2000. The reason is this: In the startup of the Windows NT system, there is a lot of important system files, and the XP's NTLDR and NTDETECT.COM will be replaced with Windows 2000 when installing 2000 on the machine installed in XP. The low version of the same name file, and the two files in Windows 2000 cannot boot Windows XP. So our repair is the file that is covered by Windows 2000 with files in Windows XP. These two files are saved in the root of the C drive, but they have the default implicit, system, and read-only properties, so you can't replace the general method, and first to release their implicit, system, and read only Attributes. The method is this: entering Windows 2000, input Attrib C: \ntldr -r -r -r-h attrib C: \ NTDETECT.COM -R -H per line in operation, then press Enter Key . At this point you have completely released the system, implicit, and read-only properties of these two files. Now copy the two identified files from the I386 folder of the installation disc of Windows XP to the C-drive root directory, and cover the original file. At this time your dual boot menu has been restored. However, we can hide the two files, the method is to enter: Attrib C: \ntldr s r h attrib C: \ ntdetect.com s r h will re-give The two file systems, implicit, and read-only properties. Start and take a look, your double start menu is completely normal.
