make bootable dvd

[~Code&Anime~]

Rufus
https://rufus.akeo.ie/

That seems like just another program unless I am wrong? OP needs help after burning the image disk as the error message is "disc not bootable". Perhaps the DVD is not configured to boot, also...Are there any error options and you have attempted these, OP ? Often there are Fx replace X with a number options to diagnose the problem, I have come across these many times.

 

[~Code&Anime~]

Hasnke is right, better a usb boot to try ...

Sorry, this is an English speaking forum, I assume. Got this using google translate though

Agreed, also it may be worth checking if DVD's generally run i.e. normal movie DVD's , etc and trying to boot with another disc to see whether it's an issue with the disk or the disk reader.