what is the exact error message, was the file readable before and what even happened that it is not readable anymore?
you can first use CrystalDiskInfo to see what state the disk is in and then it would be better to clone the whole disk anyway with ddrescue.
whatever you do, do not at least use the "chkdsk" command in command prompt because that might actually delete all of the corrupt files...(if sectors are "unreadable")
