We don't recommend ASIO4All.
From the link above:
"Please note that ASIO4All is basically Kernel Streaming with an ASIO wrapper. There's no good reason to use ASIO + ASIO4All vs just using Kernel Streaming directly in Media Center."
If your card doesn't have a native ASIO driver, I would recommend 'WASAPI - Event Style' since you're on Windows 7.