C:>chkdsk
The type of the file system is NTFS.
Volume label is OS.
WARNING! F parameter not specified.
Running CHKDSK in read-only mode.
CHKDSK is verifying files (stage 1 of 3)...
174848 file records processed.
File verification completed.
404 large file records processed.
0 bad file records processed.
0 EA records processed.
44 reparse records processed.
CHKDSK is verifying indexes (stage 2 of 3)...
55 percent complete. (172360 of 226688 index entries processed)
Error detected in index $I30 for file 30.
Error detected in index $I30 for file 30.
Error detected in index $I30 for file 30.
56 percent complete. (176194 of 226688 index entries processed)
Error detected in index $I30 for file 2087.
Error detected in index $I30 for file 2087.
Error detected in index $I30 for file 2087.
56 percent complete. (177832 of 226688 index entries processed)
Index entry TMP000000047EDFCA5632BAECA6 in index $I30 of file 3721 is incorrect.
Index entry TMP000~3 in index $I30 of file 3721 is incorrect.
226688 index entries processed.
Index verification completed.
Errors found. CHKDSK cannot continue in read-only mode.