Free trial of what software? I assume you uninstalled after the trial ended?
Even after it was uninstalled the 408 still happens in IE.
I don't think this has anything to do with having or not having McAfee installed, it's simply a coincidence. When you removed McAfee I assume you ran the removal tool also? http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp
408 errors usually indicate the page isn't responding in a timely manner and I guess IE treats pages differently than Chrome.
There's a Microsoft answer here for a similar issue: http 408/409 error - too busy to display webpage. - Microsoft Community
Or you could post a question on EightForums here: Browsers & Mail - Windows 8 Forums
Or you could simply try resetting IE11, that would probably fix it.
Open Tools/Internet Options/Advanced and click Reset, Apply and OK any prompts.
Close and reopen the browser and test it.
You will need to re-enable any add-ons you had installed.