The Ask Toolbar is a toolbar that installs negative with many programs (a little without your knowledge)
It can spy on your browsing and retrieve personal information, which is why it is considered spyware. You get infected when downloading and installing programs (including free). when you are prompted to install a toolbar from software partner. (This is also true for other harmful elements, other than toolbar)
Methods of eradication
Go to your Control Panel, add remove programs.
From the list, select Ask and click on "Remove"
Should the above fail, use one of the following disinfection tools.