I Couldn't agree more! I think that something is taking up all the resources, like a huge file or application that is being loaded at certian points throughout a flight, but I have no idea what it might be! I'm experiencing the same freezing then continuing like nothing ever happened then freezing again problem btw and it's driving me crazy! The freezing is not related to what the hotfix was supposed to fix because the NGX freezes for a while then continues working (like a long stutter), it doesn't freeze permanently like others have been experiencing. I don't experience the problem with all the other heavy aircraft I fly like the PMDG 747, PMDG MD-11, Level-D 767, Qualitywings 757 so I know it's only the NGX. I've flown other aircraft after I've installed the NGX and none have the same problem. My FSX is fully stock apart from the aircraft so I know that weather, scenery, and other FSX add-ons are not causing the problem. I don't have FSUIPC registered so the auto-save feature does not exist. My fsx.cfg has never been tweaked. I also know that my anti-virus, windows update, windows security essentials, or windows defender are not the culprits because I have those things turned off when flying. I also having nothing else running in the background when flying. I've installed the hotfix but the freezing/stuttering continues. Maybe the Airac 1108 is causing problems? I've updated all my PMDG products with the Airac 1108 from navigraph after I installed the NGX. So who knows maybe just a wild guess but you never know? Regards,Milo Hamilton