One other I noticed is that running swcclient.exe directly results in an error message about inet_ntop missing in ws2_32.dll.
I'm pretty sure this is the issue for those of us trying to run on XP.
Not sure if any devs are watching this thread, but looks like the fix is:
"In addition, inet_ntop and inet_pton can be implemented on Windows platforms prior to Vista using WSAAddressToStringA and WSAStringToAddressA."
Source: https://bugs.python.org/issue7171#msg110982