Installation in session, so I cant update

Hello Daniel,
We regret for the inconvenience you are facing with updating the AVG program. We kindly request you to follow the instructions on the article http://support.avg.com/SupportArticleView?urlname=Update-has-detected-running-installation-message-when-updating-AVG and check whether it resolves the issue.
Thank you.

Hello Daniel,
We regret for the inconvenience you are facing with updating the AVG program. We kindly request you to follow the instructions on the article http://support.avg.com/SupportArticleView?urlname=Update-has-detected-running-installation-message-when-updating-AVG and check whether it resolves the issue.
Thank you.

I cant update my AVG FREE program! When I try to update it, is says that it failed to do so, because an installation is in session? But there is nothing going on? What do I do?