Situation:
When your computer is connected to the Internet, and you read email or browse the Web, you see the error message, "Symantec Network Proxy Service has encountered a problem and needs to close." In some cases, you may lose Internet access until you restart your computer.

Solution:
In reported cases, this problem was caused by a conflict with the Venturi Web Client. To fix this problem, uninstall Venturi Web Client.
To uninstall Venturi Web Client

1. Exit all programs.
2. Do one of the following:
   • In Windows 98/2000, on the Windows taskbar, click Start > Settings > Control Panel, and then double-click Add/Remove Programs.
   • In Windows Me, on the Windows taskbar, click Start > Settings > Control Panel, and then double-click Add/Remove Programs.
     If you do not see the Add/Remove Programs icon, first click ...view all Control Panel options.)
   • In Windows XP, on the Windows taskbar, click Start > Control Panel, and then double-click Add or Remove Programs.
     If you do not see the Add/Remove Programs icon, then in the left pane, click Switch to Classic View.
3. Click Venturi Web Client.
4. Do one of the following:
   • If you were able to uninstall Venturi Web Client successfully, then go on to the next step.
   • If you did not find Venturi Web Client in Add/Remove Programs, then read the document Uninstalling and reinstalling your Symantec program after you see error messages instead of this one.
5. Depending on your version of Windows, click Add/Remove, Change/Remove, or Remove, and follow the prompts.
6. Restart the computer.

Technical Information:
The following is the complete error message:
symantec network proxy service has encountered a problem and needs to close
szAppName : CCPROXY.EXE szAppVer : 103.0.4.3 szModName : ntdll.dll
szModVer : 5.1.2600.2180 offset : 00011ec3