OK so I've got me a CD-R with some files on it. I've put things on it and taken copies of them off again with no trouble in the past. Today I wanted to get some of the music on my PC onto my Xbox 360, so I got the CD and tried deleting all the stuff on it but I was told that it was not allowed because the files were read-only.

I've tried cutting and pasting them into My Docs but I can't get them off the CD. I used Ashampoo WinOptimizer 5 to wipe them but it told me that nothing could be wiped because they were either password protected, read-only or in use in another program. I can't un-read-only them because my access is denied.

I then resorted to rubbing magnets all over the CD and - wouldn't you know it? - they're still there like some kind of foreign relative who's had sex with a barnacle.

Can anything be done at all? Is my CD doomed? Should I evwen be using a CD-R to get music onto my '360?