Windows 2000 error - help me please

[davisonwarr]

My friend uses Windows 2000. yesterday he came to me and discussed about his problem.
He has got an error message [FONT=Palatino Linotype, serif]" Stop 0x00000024" in his PC.

I tried to resolve the issue but failed to get the reason behind it.
I doubt if all his data will become inaccessible. Please suggest me the solution of this problem.

Very urgent
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[cybercore]

Error message in Windows 2000: "Stop 0x24" or "NTFS_FILE_SYSTEM"

Run chkdsk /r to detect and resolve any file system structural damage.