try getting into the recovery console by
1)by booting from a bootable winxp cd
2)let the system load up all the files needed
3)hit the key "R" when it give u an option of either selecting enter or "R" to get into the recovery console.
4)then it will ask u to select the windows u need to hit the no "1" key and then hit "enter"
5)then it will ask for admin password if u have any put in the password or else hit the "enter" twice.
6)then it will come to a window prompt type in "CHKDSK /R" without the quotes and hit enter then it will start running the process it will take around 50 -60 min.
and keep ur fingers crossed