Hi all!! Here is the problem. partiton c: win xp sp2 30GB, boots from there partition f: win 7 sp1 16GB I formated C, and of course the pc could not boot...(before formating, everything was fine with a boot loader giving the options to boot from either OS) Reinstalled xp on C installed ecb(on c) but ecb can not access boot record. Now only xp running... What I want is to merge C with F maintainng win 7 and of course to let the pc boot normally. Thank you!