you can try download and use CCleaner to clean up your PC.
After that, you can try to re-install A.V.A. again.
You can try download the A.V.A. Folder
I uploaded, it's working and when you download it you won't need to waste some hours to update A.V.A. since the folder is already updated from the Valentines Content Update.
Just follow the simple steps I've state it on that post.