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 is photoreal scenery in FSX, and how do I install it?Learn what FSX photoreal scenery changes, how to install its BGL files in boxed and Steam…Read answer →FSXShould I install FSX on an SSD or HDD?Should you install FSX on an SSD or HDD? See what an SSD improves, what it cannot fix, and how…Read answer →FSXWhy is FSX not working on Windows 10 or 11?Fix FSX not working on Windows 10 or 11 with symptom-based steps for Steam and boxed editions…Read answer →FSXHow do I add GPWS callouts to the default FSX 737?Add GPWS callouts to the default Boeing 737-800 in FSX or FSX Steam, with safe panel.cfg steps…Read answer →
Trainee
Chief Captain