nubbie here-
wireless adapter is connected 'excellent' to home network, but ie browser will not connect.
everything worked fine last week.
I believe I may have deleted "ProgramFiles\Online Services" folder when trying to clean out my computer, but I found a relacement file and loaded it. No help.
Any ideas of most common reasons for this?

Dell Inspiron
Windows XP 700M

No worries, system restore fixed the problem.