[How to] Fix the problem if XP fails to boot after Windows 7 installation? (XP/WIN7 Dual-boot)

I think some of you who were still running Windows XP might want to test Windows 7 to make it certain whether it's worth upgrading or not. But something unlucky happened and the Windows XP cannot boot after the Windows 7 installation. If you have a bad luck like me, here is a possible solution.

1. StartMenu - All - Accessories - Command Prompt

2. Right-Click on it and hit Run as Admin

3. Type in the following Commands one by one

* bootrec /rebuildbcd

* bcdedit -create {ntldr} -D "Windows XP"

* bcdedit -set {ntldr} device partition=D:

* bcedit -set {ntldr} path \ntldr

* bcedit -displayorder {ntldr} -addlast

Note: Here C: is the Windows 7 system disk while D: holds the XP.

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