https://neosmart.net/forums/threads/ntldr-ntdetect-and-boot-ini-errors-in-vista-xp-dual-boot.713/page-3
Hi dikdikdik, You should not be playing with the "active" flag, that's telling the MBR which partition contains the bootmgr. With a Vista/XP dual boot the...
ntldrntdetectbootinierrors