Windows 7 -
http://forum.notebookreview.com/showthread.php?t=318342 :
Originally Posted by RangerXML View Post
This should work:
1. Boot your computer in to Windows XP.
2. Ensure you have the Windows 7 DVD image emulated or in the DVD drive.
3. Go to “Start” and “Run”. Type in “e:\boot\bootsect.exe /nt52 ALL /force” (without quotes, and replacing e: with the drive letter of your Windows 7 DVD).
4. Restart the computer, and you will notice the boot selection menu is gone.
5. Format the partition/drive where you had Windows 7 installed.
6. Remove two files (Boot.BAK & Bootsect.BAK) on your XP drive’s root folder (C, these were backup files of your previous bootloader, now no longer useful.
7. Optional: Restart to ensure it still works.
8. Use your partition software to merge your partitions together.
This may or may not work.