In the installation of dual systems, the general newspaper and magazine approach is to install each system to separate different partitions, so as not to affect each other, causing unnecessary trouble. For example, Windows 98 is mounted to the C disk and Windows XP is mounted to D disk. So can a dual system fit into a partition or a hard drive without partitions? The author after trying to find a partition installed dual system is actually feasible, interested friends may wish to try.
Install Windows 98 First, and then install Windows XP in Windows 98. Note that when you install, you choose a new installation. Click the Advanced option in the Installation Options dialog box, and then select a new path, such as C:\winxp\, instead of the default \windows\ directory, or you will overwrite the file with the same name as Windows 98, causing the problem. Skip the step of upgrading to NTFS. After a while, Windows XP installation completed, reboot, the results found that the computer automatically entered Windows XP, the dual boot menu does not appear at all, open C disk, point "tools → folder options → view → show all files and folders", found that implementation of dual-boot required files are present, It seems that the problem is not serious, find Boot.ini, right-click, select "Properties", Cancel "read Only" then open it and edit it again:
[boot loader]
Timeout=30
Default=c:\
[Operating Systems]
c:\= "Microsoft Windows"
multi (0) disk (0) rdisk (0) partition (1) \winxp= "Microsoft Windows XP Professional"/fastdetect
Save, restart the computer, dual boot menu appears, enter two systems to try, without any problems, installation success.