I installed App as Service on a customer's computer running Windows XP Pro SP3. It worked fine for several days - successfully launched my application on restart of Windows.
The system is on a managed network. Although I can't verify it, I beleive that the customer's IT department performed an automatic update of Windows yesterday and then rebooted the PC. When I remotely connected to the PC today, neither App as Service or my application were running. (My app is configured for Automatic start.)
I tried to launch App as Service from the desktop icon. I get an error message in the App as Service window that says:
"Unfortunately, connection could not be established. Please, make sure that Application as Service is correctly installed at the remote PC, and your firewalls are configured correctly (port 20576 is open). Press F5 to reconnect."
The customer's IT department claims that nothing in the firewall configuration would have been changed by a routine Windows update.
I checked the Windows Firewall settings. Even though the configuration indicated that the firewall was 'Off', I went to the 'Exceptions' tab and added both port 20576 and the App as Service program as exceptions. I tried confuring the port for both TCP and UDP. Both Exceptions had 'Any computer' set for the Scope. I got the same error message when trying to launch App as Service after the changes.
If there is another application providing a firewall, I couldn't find it. The 'Security Center' and the 'Windows Firewall' settings in the Control Panel didn't help. The only application that looked like it could be providing a firewall was 'Symantec Endpoint Protection', but under the list of 'Installed Protection Technologies' it only indicated Antivirus and Antispyware Protection.
I found reference to the above error message on the your forum and the proposed solution was to manually launch the App as Service service. I went to Control Panel/Admistrative Tools/Services. I selected Eltima AppSrv service and clicked Start the service. This gave me a Windows error message that says:
"Could not start the Eltima AppSrv service service on the Local Computer. Error 1053: The service did not respond to the start or control request in a timely fashion."
I then uninstalled App as Service, downloaded a fresh copy from your website, re-installed it, and then repeated the entire process above with the same results. Neither a Windows ReStart or cycling the power to the PC have any effect.