Error on AVG: Cannot be updated

Hello! I have AVG 2011 installed in my PC. The problem is that it won’t update no matter what I do. Both anti-virus and anti-spyware are not out of date. I tried to solve this by downloading AVG 2012 but whenever I try to update, it gets stuck in “Analyzing the Updates” stage. I cannot uninstall the whole thing because I am worried my PC will be left unprotected if I cannot be able to reinstall it.
Any help out there?
Thank you so much in advance.
