A simple solution: 1) You boot to XP. 2) Open command prompt and navigate to \Windows\system32 on Windows 7 partition. 3) Type next command, then <enter>. bcdedit /default {current}The line above says - set default boot entry to current booted system. If you want to get an overview of BCD contents - get Visual BCD Editor. The tool displays BCD in a structured way (explorer like, regedit like) and you can change every possible parameter to your liking. Some knowledge is needed when making changes in BCD as you can make your system unbootable very easy! Always make a backup of your BCD! bcdedit /export filepath\filenameFor importing a saved BCD use bcdedit /import filepath\filename