You have pointed out already the cause of troubles>it's you cdromplayer.
After a certain time laserlenses become dirty. So the device do"nt function very well. Clean your lense before you continu. For myself I use a lenscleanercd equipped with a little brush without any fluids for that purpose.
You can check proper working: a full datacd has to be copied to a defragmentated HD in about 5-6 minutes.
[This message has been edited by Misha (edited 13 June 2000).]