I recently had a laptop shut down because the power outlet pin was broken and I didn't know it. The shop was able to take out the H.D. and I was able to copy over to an external drive all the important docs, pics, music, video etc. HOWEVER, now I cannot backup to CD any of the files on the external. They all appear to be "OK" - I have opened pictures, opened excel files etc. I would just like to get a backup copy of what we put on the external but it fails and says there are "too many errors". Any ideas on how to fix this.