removal of Ask toolbar?

Hi Matt, your suggestion did not help my problem of getting rid of the "Ask Search Toolbar". I use Chrome web browser on both iMac and a PC so that my wife can see the same I/F which is easier for her use of both computers. She herself inadverently installed the "Ask Search Toolbar" which is a form of a malware.

I succeeded in removing the Ask toolbar on iMac by using the following sequence of pulldown menus:

"Chrome"

=> "Preferences"

=> "Advanced" tab

=> "Restore" option

Using "restore" option returned Chrome browser to the original "installed" version, eliminating the unintended "Ask toolbar malware".