I have googled and based on suggestion
a) I have inserted Windows XP and selected R for recovery option.
b) Typed "chkdsk /r" at command prompt
c) After scanning for 54%, it has thrown an error due to file partmgr.sys in it saying that the drivers unloaded without cancelling pending operations
d) again if i reboot i am getting the original "Unmountable_Boot_volume" error
Please advise what should I do to resolve this?
Background:My system is DELL XPS M140. I donot have windows XP restore CD. I have tried with my friend's DELL INSPIRON's windows XP cd.