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The guessing part obviously
And btw your obfuscation is wrong it would be !@#$%^# cause same letter === same character
You could do it like OG, and try to draw something, you could do it like Mr. Kornfield and use an equation, you could do it in 1337 however you are free on that, the first hint, all the hints are essential for solving.
BTW, i think i forgott to set the rule that only working days are posting days
The way I read it, is as a substitution cypher - so each letter is represented by the same character:
So the two "D"s have the same symbol. And if you rotate it 90o clockwise if vaguely resembles an android.
And the hints:
"It's probably in your phone right now" - Android is the most popular phone OS[^] by a HUGE margin.
"You'll be malfunctioning within a day, you near-sighted scrap pile" - C3PO's comment to R2D2 at the start of the original Star Wars. C3PO was an android (and they were both droids)
"Kryton's favourite TV show has a familiar tune..." - in the episode when Kryten appeared in Red Dwarf, that was mentioned several times, and a quick google for "Kryton's favourite TV show" gives you "Androids" (sung to the "Neighbours" theme tune).
That's my interpretation, anyway - and I am rubbish at these, so I could well be totally off message here. It was a fluke that I won yesterday, it probably won't happen again!
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...