I am living in Southeast Asia and have recently bought a gaming PC for the operation of
Microsoft Flightsimulator FSX. I gave instructions to the shop to install a legal Win10 but noticed now that it is an illegal copy. According to internet infos it is possible to legalize it, but how can I install the legal Win 10 and at the same time avoid loosing data of my FSX ?
Living in two different countries, you have the gift of ubiquity.
Concerning your issue, you have a choice, wait for your computer system to be completely disabled or purchase a licence.
As for FSX, which I used to have, it was possible for me to save all of my addons on a USB key (landscapes, aircraft, airports, etc.) all of them in from different FSX folders. Easy as apple pie to transfer back to the programme.