I have the option "Post-Plan Graphics Install Prompt" enabled, and whenever the initial weather processes have been completed, I get the install prompt. But when I click on the "Ok" button too soon, the wx influenced textures do not get installed automatically, and I have to go to the "Graphics" section and install the textures there.

 

However, if I wait a few seconds before clicking on the "Ok" button (let's say 5 to 10 secs.) than the textures do get installed automatically. So, this seems to be a timing problem (and it also depends on how many waypoints you have in your flightplan).

 

I would like to point out that this is a longstanding issue, that was already present since SP1. I thought this was going to be fixed in SP2. Hopefully this can be fixed in the next update?

That is the first I've heard of this.

 

What if any anti-virus software are you using?

I sometimes have the same thing going on with the post-plan graphics install button.  I use Avast! for anti-virus and Spyware Blaster.

I use ESET Smart Security, however I doubt that this is an antivirus issue, since I completely disable the antivirus and firewall software to improve performance. It looks like it's some kind of a timing issue, because if you wait 10 secs. and click on the "OK button", than the textures do get installed. If I recall correctly I already pointed this issue out a long time ago so they should be aware of it.