[aerohacker]

There's a way to add C: partition in AntiVirus using command line, registry or another way? Except for doing this directly using GUI?

[Cecilia]

Just don't try doing it?
There's a reason why it is in the UI...
Unless you are trying to do it without the user knowing...?

[ForceJew]

Just don't try doing it?
There's a reason why it is in the UI...
Unless you are trying to do it without the user knowing...?

I think that this is what he wants to do:P

[Twistd]

There's a way to add C: partition in AntiVirus using command line, registry or another way? Except for doing this directly using GUI?

Heres a simple answer for you.
NOPE.

[SIM-3465989]

Just don't try doing it?
There's a reason why it is in the UI...
Unless you are trying to do it without the user knowing...?

Stop being a whiteknight, I think OP's intentions are obvious.
To answer OP: No, this is obviously not supported by any virusscanner natively.
You'll have to hook into the AV and modify the exclusion list accordingly.
However, I doubt you'll be able to get the needed permissions to do so and even then it's probably a near impossible task (or else everyone would be doing it).
This is why crypters exist to make your files undetectable. It's the next best thing. 🤝