Hi, I just installed the 747 cargo and have yet to fly a complete flight without a hard lockup where the sound goes into a loop and I have to shut my PC off and reboot. Everything was working fine with my other PMDG747(boxed version with update installed)until I installed this new plane. Can someone help me out with trouble shooting this? Thanks for the help, Ron

Just to add a bit more detail to my original post, this always happens in flight during cruise . I thought originally it could be the way I was importing the fligts into the FMC so I manually programed it , and the same thing is occuring. I've also tried re-installing the sound card drivers as I had thought it could possibly be this, but still the same. Also I'm using 4x time compression. I have to try a flight without it to see what would happen but I didn't have a problem using it before the install....Anybody????Ron