First of all you have to have admin rights on your computer in order to install this extension, in other words you should be able to install other programs on your compuer. If you have gone through installing the extension but AwardWallet keeps telling you that the extension is not installed you should verify two things:
Make sure that the extension is actually enabled. Here are couple of screenshots that can help you do that:
Make sure you fully restarted Internet Explorer after enabeling the extension. In most cases closing all the browser windows, but in some cases a computer reboot is required.
If these steps do not work you can try uninstalling the extension and installing it again from scratch. Here is how you uninstall the extension: