Goto Start / configuration screen / remove program and select Ask Toolbar and click remove.
When this works, you still have to change the homepage from your browser in the settings of your browser.
Problem is, there are many different versions, and the newer versions are more difficult to remove.
You can try one of the programs in these links to install your version
Still no success? then you need a more potent uninstaller, but this one is not for free. You can use it for 30 days, but after that you have to uninstall it or pay for it. You can get it here:
I hope the uninstall worked, with at least one of the options. If not you need more specific help but will be different for every situation.
When the ASK toolbar is removed, your computer is still not as it used to be. You now have to setup your browser with the search engine you like the most.
In IE9 on the top right is the gear wheel. Click there and select manage add-on / search engines
Select your favourite search engine and click on select as standard. When you want you can remove the other ones with Remove.
In Firefox also select manage search engine on the left of the menu.
Select the engine you want and click on the up button till the line is on top.
To make it your favourite or startup home page in;
IE9 in the menu Extra you find the gear wheel. Click there. Then on the tab General click on Start page and type in your favourite.
Firefox On the top left on the orange button Firefox / Options click on general and in the box start page type your favourite.
How to remove the ASK toolbar on Google chrome
To many questions about the ASK toolbar are popping up.
I found this link, explaining how to remove it here:
1) ASK Toolbar Remover AutoClean
2) Downloads AutoClean