- C: drive to install Windows 7,
- drive for example F: ready to install Windows XP.
Problem:
If you install Windows XP operating system on a Windows 7-based computer, Windows 7 no longer starts. In this case, only the Windows XP operating system starts.
Solution for dual boot Windows 7 with XP:
- Start Windows 7 System Recovery Discs and repair existing Windows 7 instalation (if you don't have any, you can download Windows 7 System Recovery Discs).
- As administrator copy file F:ntldr and F:boot.ini into root C: (because to run a version of Windows operating systems based on Microsoft Windows NT, these files are necessary).
- Edit file C:boot.ini
[boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(3)WINDOWS [operating systems] multi(0)disk(0)rdisk(0)partition(3)WINDOWS="Windows XP" /fastdetect /NoExecute=OptIn
Note: You can change bold written text, partition number depends on the partitioning:
default=multi(0)disk(0)rdisk(0)partition(2)WINDOWS
- Restart the computer.
Post-installation verification:
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