I've bought the pmdg 777-200Lr on the 23/06/2014 and have many problems with my new laptop msi gs70 2pe-015fr with win8.1 and fsx. So i decided to install a new OS on my laptop (win7) but when i wanted to install this product (777) the activation key didn't work :" The activation of the fulfillement is denied..." I've sent an email on the pmdg website two days ago but no news from now... hope to find someone who can help me.