uninstall and install Avast

Hi all,
I need some directions. I believe my Avast is corrupt and I want to un-install it then re-install a fresh copy of the software. I need to know what steps I take. Do I download the fresh software before I un-istall the one I am using now? Can I use the some activation code? Is there an un-install tool on Avast website that I can use? If so please give me the link. Any directions you can give me would be greatly appreciated as I want to make this run as smooth as possible. I am throughly pleased with Avast. Thank you.

I am so sorry, I put this in the wrong forum. I will now put it in the right forum. Very stupid of me.

Yes, this is the server forum.
Please, do not post twice the same… just double the help effort.
Follow http://forum.avast.com/index.php?topic=43859