The most common and most likely answer to this crossword clue is the 9 letter word ANTIVIRUS
A
N
T
I
V
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S
More clues leading to the result ANTIVIRUS
- It's run via special sort of software
- Strain IV struggles to contain universal tablet software
- Program of protection against force encircling Russian domain
- Sort of software preventing ruin with Vista running
- A versatile, intrusive almost, type of defence …
- Perhaps Norton is against six; primarily routing everyone
- This protects a computer from getting cold?
- Combating bad stuff spreading online dealing with Covid?
- Sloppy vulgarisation with no organised goal for program
Buddy explains!

The straight part
We know that "Perhaps Norton" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case perhaps norton = antivirus.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ANTIVIRUS mean?
ANTIVIRUS noun- A piece of software that is used to detect, delete and or neutralize computer-based viruses.