You can do it from within the Internet Options by going to Tools, Internet Options (form within Internet Explorer) then click on the content tab on top, then make sure the button says Enable on it but don't click as that will enable it. If it says Disable, then click on it and disable it and sometimes will ask for the password that you set.
If you don't remember the password then try the link below and see if that works and restart your pc.
http://www.vcn.com/knowledgebase/article.php?id=310
*I found this on Google, just so you know, I haven't ever tried this before.*