Need Help, Don't know what do to

Hey guys!
i use avast for over 6 years now. I never had any problems. but now i get every 10 min the same alert.

i think nothing wrong is happening, because avast always blocks the “infection”, but i hate the poping message every 10 min. -.-

my english is not the best, hope you can help me!

Windows 7 - 64 Bit
Avast Free Version


http://s14.directupload.net/images/131210/dyb3mkt9.png


http://s1.directupload.net/images/131210/fp9s6wvi.png

Please follow the steps in this thread http://forum.avast.com/index.php?topic=53253.0
And attach the results here