Well, I got Knoppix to boot from an external DVD drive and bought some DVDs (my software engineer friend still uses these for backing up data!). Unfortunately, when I change back the boot order, it won’t boot from the hard disk (or the USB, regardless of hard disk priority). I used ROSA to burn another disk, not without problems to get it to burn. Another file without Plasma worked for burning with ROSA, so I went with that.OpenMandriva Lx - Browse /release/2014.2 at SourceForge.net Hopefully happy ending coming today.