i have been having a problem since i got SBC DSL. i was constantly getting the message that no connection was available while i was surfing...even tho i mite be streaming audio or video with no problem. also many times i would click a link and nothing would happen for 20 seconds or so. i found the fix below and so far it seems to have worked. maybe this will help someone else.

Open the registry and Navigate to:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\WebCheck
Look for these two entries in the right pane. Double
click on each and modify its value to 'Auto'

That's it.