I keep getting a pop up from avast telling me that a 'threat has been detected' What can I do to stop this from popping up?
seems you may have something that is trying to phone home

follow instructions and attach logs (not copy and paste) http://forum.avast.com/index.php?topic=53253.0

run in order listed
AdwCleaner / Malwarebytes / OTL / aswMBR

when done, removal experts will be notified and help you
when finish, all tools used will be removed