new constant issue Avast fighting Symantec

Viruses and worms
1

recently i have been getting a Threat Block issue.
Once is starts it wont stop until I shut down:
Avast shows it as
Object: C\ProgramData|Symantec\DefWatch\dwha128.exe (only one of the dwha file names)

But Symantec also blocks and quarantines the dwh1234.exe
as a Trojan.Gen.2

HELP! How do I stop this? Computer store?

2
new constant issue Avast fighting Symantec
There can be only one ;) https://blog.kaspersky.com/multiple-antivirus-programs-bad-idea/2670/
3

→ https://www.avast.com/faq.php?article=AVKB11#artTitle