I have had this problem twice, once when I installed 10.10 and now when I install 11.10. When I boot it tries to automatically connect to my wireless Internet, witch is not a problem, but it seems that whenever it does this, the system will freeze completely.
It works fine if I boot into safe mode and disable the network manager. But even when I'm running the live-cd and I go up to the network selector, as soon as I click it freezes. It is an Acer Aspire One 722-BZ454.