Whether the fact is that after you reboot the computer, it asked you do startup repair immediately or during the chkdsk process?
In fact, Windows chkdsk may cause damage seriously. I also encountered the similar problem. As Windows cannot boot, you tried repair by the system CD, but cannot do anything. Much more the command line is quite different with XP.
In my opinion, you’d better copy the partition or hard drive sector by sector and try other software to repair or recover data.