You are using a new program for a web browser, so your old toolbars remain installed on the old browser. If you buy a new car, do you expect to find our old radio presets on it? Nope, need to set them up again.
You don't want to go back to "Windows", I'm guessing you wanted to go back to using Internet Explorer.
Uninstall Chrome, start Internet Explorer from the shortcut for it, say Yes when it asks you if you want it to be the default browser.