How Can I Fix A Hard Drive Detect Failure On A Dell Inspiron

I did back it up. and it keeps saying this. I did a disk doctor scan-here’s what the results are: HELP ME GOD!

C:\ Volume Label: OS, File System: NTFS

Volume label is OS.

Disk Doctor is verifying files (stage 1 of 3)…

134848 file records processed.

File verification completed.

675 large file records processed.

0 bad file records processed.

0 EA records processed.

50 reparse records processed.

Disk Doctor is verifying indexes (stage 2 of 3)…

Index entry WmiApRpl in index $I30 of file 6347 is incorrect.

Index entry SECURITY in index $I30 of file 6675 is incorrect.

Index entry SECURITY.OLD in index $I30 of file 6675 is incorrect.

Index entry SOFTWARE in index $I30 of file 6675 is incorrect.

Index entry SOFTWARE.OLD in index $I30 of file 6675 is incorrect.

Index entry WmiApRpl.ini in index $I30 of file 7683 is incorrect.

Index entry {0eca4bdc-9ee8-11df-96da-0023ae0930ff}{3808876b-c176-4e48-b7ae-04046e6cc752} in index $I30 of file 99619 is incorrect.

Index entry {0ECA4~1 in index $I30 of file 99619 is incorrect.

176928 index entries processed.

Index verification completed.

Errors found. Disk Doctor cannot continue in read-only mode.

WHAT DO I DO?!!?!!?