Okay. Look for a blue box with two antena coming out of it.
This is your router. Love your router and your router will love you.
Unplug it for thirty seconds and plug it back in. This will usually fix a bad connection.
You can also click on the picture of the one computer with the three little waves coming out of it. click "restore" this will reconnect you to the internet.
A system restore is your last option. Go to
start
help and support
system restore
restore to previous time
and set the restore to two days ago.
It will shut down your computer and restart.
That will fix most problems.