The PC version of Desert Island Assistant? (6,6)

I believe the answer is:

person friday

I'm a little stuck... Click here to teach me more about this clue!

'the pc version of desert island' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'assistant?' is the wordplay.
I cannot really see how this works, but
'assistant?' could be 'person' (assistant is a kind of person) and 'person' is found within the answer.
The remaining letters 'friday' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Times.

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