Check that Enable third-party browser extensions box is ticked. In internet explorer click on tools, internet options, advanced tab and it's under browsing. If not ticked then tick and close IE and open again.
If you haven't got File Edit View etc along the top then right click at the top and you should get a drop down list of tool bars. Click on the toolbars you want.
If you have File etc, click on View and select toolbars.
If you haven't got any toolbars able to be clicked then you need to click on the settings button and then on manage add-ons and see if the toolbars are listed there. You will need to select on the bottom left - all add-ons. You can enable or disable them there.
This response is a bit specuative. Are you running 64 bit operating system - eg Windows 7 64 bit? If so, you have two versions of Internet Explorer; one 32 bit and one 64 bit. Check out which one is displaying your toolbars. You might have to install them in the other version????