Me too. I bought mine from a third-party vendor a decade ago, and it worked fine until my HD crashed and I had to reinstall my CS6 Master Collection on a new one. Had to purchase third-part serial number recovery software to do so, and when I input the serial number it turned up for my CS6 MC I was told it was an "invalid number." Turns out Adobe sold batches of SNs to third-party vendors and later decided to invalidate them. Ha ha. I bought it in good faith and Adobe VALIDATED it for over a DECADE until this happened, so as far as I'm concerned it's ADOBE that cheated me, NOT the TP vendor. I WON'T RENT SOFTWARE, so I'm switching to the Affinity graphics products. Goodbye, Adobe.