@galaxis It's a rather user hostile defense against counterfeit USB-serial chips by Prolific.

It means your chip is fake. That's okay, it will work anyways if you simply install an older driver.

Found this helpful blog post that summarizes why and what to do:


@yngmar Yeah, I know about the counterfeit protection, but I've owned this specific adapter for a very long time, and it didn't use to have any problems even after Prolific added that check to their drivers.

@galaxis Maybe it's an old fake, or maybe it's genuine and simply a case of DRM working as intended, which is annoying the genuine customers and everybody losing in the end.

@yngmar Yeah, I'll certainly try using that old driver anyways. (I thought I had a copy somehere already, but apparently I don't...) So thanks for the link ;)

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