firewall, should be able to notify you of any out going connections with where to & where from (program & port) to allow you to allow 1 time only, every time or deny always. It is one of it's main purposes!
Several free ones available including:
http://www.personalfirewall.comodo.com/ (Pro is free, Plus is pay)

Maybe the easiest & cheapest way to check that those uploads are known to you. Good Luck! Happy