I ran the "chkdsk c: /F" again and got the following results:
The type of the file system is NTFS.
WARNING! F parameter not specified.
Running CHKDSK in read-only mode.
CHKDSK is verifying files (stage 1 of 3)...
CHKDSK is verifying indexes (stage 2 of 3)...
Deleting index entry firstname.lastname@example.org in index $I30 of file 111137.
Deleting index entry BINCLE~1.COM in index $I30 of file 123391.
Errors found. CHKDSK cannot continue in read-only mode.
Again it shows errors! What next?