Bad day for me.all of a sudden my installed hptuners software is asking for my application key.i can't find it.i can't find the serial # for it either to try and get a new application key.anyone have any ideas? Tried the # that's on the box that connects to the connector.but on the hptuners.com site, it says invalid.

Hp Deskjet 850c Driver Download Xp on this page. I bought this from Ron9919 over a year ago, he got it from someone else.he hasn't been getting back in touch with me at all to help out.contacted hptuners also but thought maybe someone here who knows the software might be able to offer some insight as well thanks.

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