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Test Disc Read with Copy or Xcopy
Copy and Xcopy are command-line utilities that typically uncover a disc-reading issue. If Copy and Xcopy complete successfully, the issue is unlikely to be a problem with reading the disc. A failure to copy may indicate drive problems or system problems; in that case, do more troubleshooting.
To use Copy and Xcopy to test disc-reading, follow these steps:
1. Click Start, and then click Run.
2. In the Open dialog box, type cmd, and then press ENTER.
3. At the command prompt, type one of the following commands: To copy a folder:
copy <I>discdrive</I>:\<I>foldername</I> <I>drive</I>:\psstest /V
To copy the whole disk:
xcopy <I>discdrive</I>:\*.* <I>drive</I>:\psstest /V /E
NOTE: discdrive is the drive letter of the CD-ROM or DVD drive, foldername is the name of the folder containing files that you have to have to access on the disk, and drive is the letter of your system hard disk.
4. Press ENTER.
5. If you are prompted with the question whether psstest specifies a file name or directory name, press F.
6. If you are prompted to overwrite, press A.
NOTE: When you use /V with Copy or Xcopy, the copied files are verified. This takes longer but it makes sure that the files were copied correctly.
Got the info from over
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q321641]here.