If you go for a free one, I've been relatively happy with Avast. However, there's some tricks to be done both during and after the installation. Similar tricks have proven to be good practice for many other installation procedures, too.
The first thing when uninstalling AVG is to first run the regular process in Programs and Features. Then run the AVG Remover utility to get rid of what the uninstall has left behind:
http://www.avg.com/us-en/utilitiesWhen installing Avast, choose the Custom Install. By default it gives you all of the options checked, even the paid ones. If you leave it that way, the paid options will do some checking every once in a while and ask you to buy them to fix the issues they've found. Instead, choose the Minimal Install from the drop down menu. From the left column you can then add a couple of features if you so wish. File Shield and Web Shield are the obvious choices and definitely needed, Mail Shield is a good one if you use a specific e-mail program or app but it's unnecessary if you read your mail using your browser. Browser Cleanup and Browser Protection can be useful. The rest are either paid or unnecessary.
After having installed Avast, add an exclusion for Aces High, or even for the entire C:\Hitech Creations\*.*
