Hy. how can I activate a second copy of FSX..... please!
3 Answers
You should have a key number (yellow) in the case.
If you lost it call.
https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers

I have the key but I want to use the same key on an other PC.....is it possible?
No, they will only let you install it on one machine, one person.
Of course it may work but I doubt it.

Still stuck on this question?
Ask Fly Away, our AI flight sim & aviation assistant, for an instant answer to this exact question — or ask the community below.
FSX — recently answered
FSXWhat KMCO scenery add-ons are available for FSX?Compare four freeware FSX KMCO scenery add-ons for Orlando, including gates, parking, jetways…Read answer →FSXIs there an FSX demo, and how can you try it?Download the legacy FSX demo, see what it includes, and fix common installation problems on…Read answer →FSXWhat KLAX scenery add-ons are available for FSX?Compare four KLAX scenery add-ons for FSX: a full airport rebuild, lightweight update, AFCAD…Read answer →FSXHow do I start the PMDG 737 cold and dark in FSX?Start the PMDG 737 NGX cold and dark in FSX with the correct power, IRS, APU, bleed-air, fuel…Read answer →
Trainee
Chief Captain