Cyclic Redundancy error

Hi
i need help to solve these queries:
1)How to retrieve files from C -.While copying the CD to hard disk the copy process stops and says that the file has Cyclic redundancy error.Can u suggest some way to overcome the problem?

2) How to chk the health status of CDRW diskette in Win XP?How to correct the disk (Hard disk and removable)incase of any errorer in Win XP?

Thanks
Chari