PMDG 777 Autopilot disconnect alarm will not shut off, no matter what!

[zap51]

I am doing a flight from KDEN to EDDM. After several hours on a long haul flight I always have to reboot as my FSX because it eventually will freeze for about 20 seconds the unfreeze for lie 3 seconds. When I rebooted and reloaded my flight, during the 18 second initialization, my plane will rapidly decended. This time once the initialization finished, it kept descending and the Autopilot warning came on. I had to manually level my plane. This siren will not stop. I tried everything. I turned the AP off and on. Went into PMDG SETUP>AIRCRAFT>EQUIPMENT>toggled the RESETTABLE SIREN and still nothing. Any suggestions on the stubborn AP and also the FSX lag on long hauls? Thanks.

[ntai]

I'm not sure that i follow you. You mean that you save your flight, and then reboot the computer, and then resume from where you left off? Could you post your computer specs as the freezing issue shouldn't be happening.

[zap51]

Windows 10 (originally Windows 7) 64-bit. Intel Core i7 processor 680, ATI Radeon HD 5770 1024MB, 1TB Hard Drive, 8 GB DDR3 memory.

[ntai]

Take a look at this. Scroll down to hardware and (something) issues

http://www.mutleyshangar.com/reviews/bc/t7/t7.htm

I confess this is beyond my technical understanding, but this is probably one for the PMDG Forums.