The Aircraft stops flying approx. mid flight and this incident was repeated when using the same flight configuration. The video image remains the same and the only evidence of the problem is that the distance travelled indicator no longer works. To get back to 'desk top I had to use the Task Manager.I have been experiencing other problems with the use of your product and I took the decision to align my system with all of PDGM's documented advice and suggestions. Accordingly. I uninstalled FSX + addons and started . again. In so doing I created a separate partition for FSX (as advised) and made the changes to FSX.cfg (as advised) I have reinstalled PMDG Boeing3700NGX (as advised) and now have been confronted with another problem. Frustation should surely be excused?.I am well versed with the well documented procedures for flying the aircraft now and really would like to enjoy the use of the product. With your further assistance perhaps this could be achieved. Regards James

So what you're saying is that FSX is freezing? Did you have this problem before service pack 1? I had the same problem after the upgrade. I was running a 2600k at 4.8 ghz and back off to 4.6 ghz and so far so good. Granted I haven't done very many flights to confirm but I'm hoping that was the issue. If you're not overclocking, could be a hardware or driver issue. Does FSX freeze with other aircraft?

Thanks for your reply Steve. No problems with other aircraft. Problem appeared prior to installation of SP1 upgrade.I've alsonoticed that loading 'saved flights' of PMDG aircraft, takes forever. Regards. James