This is a follow-up on my earlier post in this thread. I had those freezes mainly when entering data in the FMS. But also during normal flight. Finally, I installed the latest version of FSUIPC (4.928) and now after 5 flights of various lengths the problem seems to have disappeared! But this may or may not be a cure for every problems mentionned in this thread!
Keep the blue side up!
Roger Buisson