Pondus
2
if you check … ad remove programs > do you see more then one listed?
also see FAQ section here http://www.avast.com/en-gb/faq.php?q=software+updater#searchForm
avast! 2014: Resetting the internal database of the Software Updater http://www.avast.com/en-gb/faq.php?article=AVKB110#artTitle
did this help?