The user interface or UI relies on a working non-beta Internet Explorer set to its default settings.
Please make sure that Internet Explorer is not a beta version because this was a typical occurrence with those versions, if so then please uninstall it and then go to Microsoft's website and install the latest version of IE for your operating system
IE9 for Vista/Windows 7 and IE8 for XP.
Also, if it isn't a beta version try going to Tools/Internet Options/Advanced and click Reset, Apply and OK.
Close and reopen IE and go to Tools/Manage Add-ons and re-enable any add-ons you need.
If IE8 is listed in Control Panel/Programs or your Installed Updates, try uninstalling it anyway and then rebooting.
Then install the latest version from Microsoft.
What is your operating system and service pack please?
Windows 7 Home Premium operating system, doesn't say a service pack version. The previous tech support also did the steps up to Reset, that didn't work (I just tried it again) I'm going to try uninstalling IE8 now and installing IE9. Edit: Also I want to mention that this is a new issue, I was using Mcafee for about a year now with no issue.
Try that and then try to install SP1 and there is help for that here: https://community.mcafee.com/docs/DOC-2205
Edit: New issue eh? Hmm, that is strange. What else did you install in that time?