3 Answers

Highlight "aka" on the toolbar and right=click. You should see a number of options appear in a box.  Choose "delete" and it should disappear.  
But check us out for a while.  You might like it here.  

akaQA, it is a webpage on the internet, it is not in your computer. It is more than likely attached to your toolbar. You would have to uninstall the toolbar to remove the application that directs you to our site via the ask a question box found on web pages or a button on the toolbar. You are not obligated to use either one.

You have to delete the toolbar it's attached to to "delete" akaQA. I do not know which toolbar you have that it's attached to. If you see a green or blue Ask a Question button on your tool bar, right click on it, select show/hide, find the akaQA icon and click on it. This will deactivate ask a question (akaQA).

We're not a BAD site at all, stick around for a little while!