This is my first time posting...hope I got it right!
I've been flying my -800 for several months and had my FSX setup tuned to perfection when Monday 10/27 I became unable to load any 737NGX aircraft or saved flight in FSX. The sim would freeze after clicking "Fly Now". All of my other default and add-on aircraft were unaffected. I re-installed the NGX but the problem persisted and now I could see the sim freezing when I tried to activate the PMDG modules on first load. Next I formatted my SSD, re-installed Windows 7 64 bit, did all of the Windows updates and re-installed the NGX. Problem persisted. When I reverted to an early restore point...BINGO...problem disappeared (although the sim started exhibiting other problems).
I'm thinking the problem was caused by a Windows update around that time but unfortunately I realized this way to late to be able to see what update was installed just before this started. Did anybody else see anything like this? Any thoughts or feedback would be appreciated...