I have purchased five sceneries from FSDreamTeam over the years and have had trouble installing each and every one! Why is it that I can install sceneries from other companies, such as AeroSoft, BluePrint, FlyTampa, ImagineSimulation, etc., and have ABSOLUTELY NO TROUBLE with their installers and updaters???
Those are just sceneries, our are way more complex, because they include lots of executable code to do interactive things they don't do, and if you look in the Aerosoft forum, you can find plenty of threads about problems with their Launcher, which is fairly normal because, any time you have to add something executable that links to the user systems other installer libraries, you are going to encounter problems in any case, because any system can have its share of potential conflicts. Airplane developers have way more trouble with compatibility, and our sceneries are more similar to airplane products, it's wrong to compare them to other "plain" sceneries.
I think you should seek advise from any of these companies and consider using the techniques and/or technologies they use. You cannot beat a flawless install. After all, the customer EXPECTS this!
The installer works just fine. If the antivirus is interfering, the installer can't do much about it (an installer capable of disabling your antivirus automatically would need to be more intrusive than a *real* virus) so you, as a customer of such antivirus, should expect it won't interfere with legit products, and that's something that some antivirus product simply don't do, because (for marketing reasons) they want to be able to advertise the fact they can catch more virus than the competitors, so they use questionable heuristic methods to detect threats instead of just using a database of what is *proven* to be a virus.
If you look the Flight1 forum, they have trouble
And you know your sceneries are more expensive, for the most part, than your competitors; so, you should be focused on a FLAWLESS install of all your products.
Your installers are already working, so they won't be changed much, because there's no need to. The only thing we can do to improve problems not caused by our products, is to work more with antivirus makers and report false positive more often to them, but unfortunately this is not always easy to do. Norton, for example, keep ignoring us, repeating their antivirus doesn't mistakenly detect our products as threats, even if it does...
Now, back to your problem, I gave you a suggestion, you have replied with a complain without telling if it was fixed in the end or not. Was it the antivirus ?