I could not connect to my home wifi with my new W7 laptop -- eventually discovered that default power setting for wireless adapter was not compatible with my router -- see this tech note for full discussion of problem and the solution: http://support.microsoft.com/kb/928152

Hi Prof Dan, Thanks for sharing the experience. Regards, MiyaThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.