I used the manual of the Norton.-side exactly:https://support.norton.com/sp/de/de/home/current/solutions/v72380755
it is called "Einsatz von Norton Bootable Recovery Tool".
Unfortunately the link https://security.symantec.com/nbrt/nbrt.aspx?lcid=1031
goes in a mistake....
This is why I got the file nbrt.iso from an other provider.
By this nbrt.iso file I have created a DVD and a stick.
In both case occures the message: after booting:
"Not be certifiedby red hat.
This site exits, but where will I find my file?
I aked your Chat and waited more than one hour and the woman (only women there?) told me:
"It is a free software and the forum is responsible.
Please help me.