2 websites in particular, Jokersupdates.com and slice.ca that I use every day I suddenly can't access from my laptop. I can access them from another laptop and a kindle at the same location so the problem is on my computer. I have that problem using both firefox and chrome. I've cleared the cache, done a system restore, I don't know what else to do.
Not sure where to move this without information on what McAfee components you have. It could be Parental Control restrictions, or SiteAdvisor blocking, not sure without an explanation of exactly what it is you get.
If this is Enterprise then I don't know.