check for corrupted files

Other than chkdsk, What program can interactively check if NTFS files are corrupted (either written corrupt files or files which became corrupted after their original write)

If such a program exists, does it need to first checksum every file on the drive to have a "known-good" reference table?

Does NTFS keep checksum information for every file by default?

Is there a way to check files for corruption without knowing their original checksum?

>>1
AUTOCHK.EXE (ran on boot if the drive is marked as dirty) doesn't compare checksums, nor NTFS keeps them at all; that'd be hell slow. It just checks the MFT, the metadata, and other NTFS structures and fixes inconsistent information about your filesystem, splitting, deleting, or assigning files in the process. You probably got it mixed with SFC.EXE which protects system files.

Is there a way to check files for corruption without knowing their original checksum?
Nope, sorry.