Each original file will have an md5 or sha sum which indicates if all files and the ISO size match the original.
Are you able to mount and play the files?
Set the user permissions for all users.
If that doesn't work then...
If you want to copy then I suggest the quick following:
Go through my post history for a Knoppix howto. Use the pre adriane release.
Attach a usb device after you have followed the section about character/keyboard repeat.You can copy the files to a usb key.
ok heres the probelum, i belive my 7 year old changed somthing.. here goes: i have a folder on C: drive containing all iso files of my sons dvds he likes. he mounts them him self using dameon tools to watch.
suddenly one day the folder was empty?
so i did a system restore now the iso files are back.. but i cant move/ copy or open them. example error code reads cannot open file. reason access denied. any ideas?