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If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message. Visit our Microsoft answers feedback Forum and let us know what you think. Microsoft Games and mapping: invalid product key You can read the following article and check if it helps. We could solve this here or should I go back to the retailer? I tried following the instructions of technical support, but they ask the number PI, that I wouldn't find anywhere in FSX Deluxe (which is already activated and good work) or FSX Acceleration (works only in mode activate later ). I tried to use the same key as Deluxe, but it says it is invalid. FSX Deluxe activated perfectly, but I'm not able to activate FSX acceleration due to the absence of key I guess. Inside the box of however, there was only a single activation code, saying clearly "FSX Deluxe.
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I bought 'FSX Gold edition' from a retailer which included FSX Deluxe (2 CD ROM) + FSX Acceleration Expansion Pack (1 CD ROM) the package was of course with the Microsoft seal unbroken. Original title: problems to activate FSX Acceleration Pack Error message: product key not valid during activation of FSX Acceleration Pack
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