Thanks a lot for the support & suggestion Well it's not the Linux Boot Loader Grub that's posing a problem,i'm having problem installing Windows Boot Loader back.What Grub does is to handle control to Windows Boot Loader.From the past experience i know that when u run setup of Windows XP it restores Windows Bootloader on the MBR & detects other Windows OS e.g. Win-98,the problem is, that isn't working either I just can't understand why even after running Windows XP Setup after the text mode setup the Bootloader of Windows can't start,it of course has overwritten the MBR because Grub is gone but somehow NTLDR can't just kickoff & get the windows boot. Instead it gives an messageI hope this helps to understand the problem, Thanks in advance