Try one of these...
Step 1: Enable add-ons.
1.Click the Internet Explorer Tools menu or press Alt-T on your keyboard.
2.Select Manage Add-ons.
3.If Google Toolbar, Google Toolbar Helper or Google Toolbar Notifier BHO are disabled, select each add-on and click the 'Enable' radio button.
4.Click OK.
Step 2: Enable the Toolbar in the 'View' menu.
1.Click the Internet Explorer View menu or press Alt-V on your keyboard.
2.Select Toolbars.
3.Select Google Toolbar.
Step 3: Reset Internet Explorer settings.
1.Click the Internet Explorer Tools menu or press Alt-T on your keyboard.
2.Select Internet Options.
3.On the Advanced tab, click Reset.