Just went though it with tech support. I thought I had posted the case number, but I don't see it.
Case # 0760299
First, it took some convincing since the .net app is one we developed. I pick the simplest one, just a wait program that delays for a batch program. It could be any of the .net. The other interesting thing is the link above, he says if he includes a "config" with the exe that he did not see the problem, without it he had the problem. This makes me think Symantec is tweaking a iexplore security setting.
Anything showing in the logs?
No.
Is it possible the firewall is blocking traffic?
It was not installed.
Rafeeq,Have you tried with only Antivirus and Antispyware components only?
Have you tried by disabling all components except for AV?
This is were it got weird. We un-installed everything and the issue disappear. So we started turning them on one by one and they all worked. Then we un-installed the firewall and it still worked. So, I did a remove install, then re-installed the exe I exported and the problem returned. I just exported a install that included the firewall. Somewhere I saw something about a bug and they had to installed it, then disable it. I will update after the test.
What SEP components are installed and being used?
The feature set with the issue:
Under "Virus, Spyware, and Basic Download Protection
Advance Download Protection (this one only)
Proactive Threat Protection
SONAR Protection
Application and Device Control
Network Threat Protection
Intrusion Protection (this one only)