The message
from "Franz Heymann" contains these words:

I would rather rely on Norton to fight virus attacks than rely on Microsoft.

Whatever you do then, don't do a reformat. You'll lose your 'licence'
which is (probably) hidden somewhere in the registry.

No amount of pleading, threatening, e-mailing Symantec will result in
your AV program working again. Ever.

--
Frère Jaques
They knocked the Bell down and erected a charade of pops.