Tim Capps wrote on Jul 13^th, 2009 at 11:30pm:

REX is due for an update.  When your weather updates, does it do the whole freezing thing over again?  Now that you mention it, I can't recall seeing that before in the middle of a flight.

Yes during the update it freez fsx and then it's impossible to go on, I mean everything works fine but flight plan and autopilot.