how i can boot windows 7 , windows 8 , windows 10 three in one USB for installation..
when i try to install anyone from USB i got error..
if i make USB with one OS than work good...
if i try to make USB with 3 OS its can not install its got error..
sorry for poor english.. please reply me.. and how to change these bootmgr and them menu.lst seetings.. thanks alot
please full tutorial