"Unexpected error occurred." when trying to access Properties of a network connection in Windows XP
CAUSE
The corrupted Registry entries for the DLLs that manage network properties.
WORKAROUND
Re-register the DLLs into the Registry.
1. Open a new command prompt (CMD).
2. Type Regsvr32 %SystemRoot%\System32\netshell.dll
3. Press OK.
4. Type Regsvr32 %SystemRoot%\System32\ole32.dll
5. Press OK.
6. Reboot your machine