I haven't been able to connect for 4 days.

windows vista adm user
McAfee internet security 2009
2.00 GB
6.10GB
DSL
don't know
Home
lw 4.18.8 pro java 1.6.0
northwestel
yes
no
exper user
yes
don't know
Canada
no
I've tried the things that worked in the past but nothing seems to work .
Can someone please help