how to do with ntLdr? First Bold: No, it wont, thats for sure, if windows cant boot (because ntldr is missing or boot.ini is corrupted, you NEED to have Windows XP recovery cd to give command for repairing MBR, the command is "fixmbr ", which repair MBR. Second Bold: yes, ican edit boot.ini with ease, what all files i need to do this (complete file listing please, i will download them myself), if possible can give links for downloading. Second thing, how can i save MBR in a file? and a small question (out of context), can i make another partition bootable (whether primary or extended)?