Hi allI have recently had a few issues with FSX which has promted me to uninstall it and re-install. The reason for this is i had a new PC and installed FSX to the default location while using windows 7 (not clever - i know).My 737NGX was working beautifully before the unistall though (it was FP software that promted me to uninstall FSX!!) previously in the default location.However, after doing a clean uninstal of FSX (as per the unistall steps posted on the PDMG website), my FSX crashes when i select the 737NGX (windows returns a fatal error and re-starts FSX). I can load and fly any other AC (includeing the PDMG 747-400) but numerous attempts with at loading 737NGX are unsucessful. I also wasnt asked for the registration key upon installation.....Any ideas or pointers would beappreciated.Thanks,Rory

I have same problem...

I also have the same problem.1. I installed in <C:Program Files(x86) Microsoft GamesMicrosoft Flight Simulator X> once.2. Activation was performed and it was used satisfactorily.3. FSX of C drive was uninstalled, and it installed in other drives.4. The present composition is only FSX with Acceleration, PMDG747-400x, and PMDG737NGX-800/900 sp1b.5. PMDG747-400x can be selected satisfactorily. If PMDG737ngx selects, FSX will crash.CPU:Intel Core i7-2700kM/B:ASRock Extreme7 Gen3VGA:MSI GTX580 LightningMem:DDR3 PC3-12800 4GBx4SSD:Intel 510 SSDSC2MH120A2K5HDD:SEAGATE ST1000DM003OS:Windows 7 Ultimate 64bit