So Frustrating

So ever since I changed my link list to a blog list with picture icons and blog title updates, my computer has started blocking several of my saved blogs. I tried changing the blog list back to a plain link list with no icons, but I still can't get into half of my friends' blogs! And it seems like every week it blocks me from another blog. I tried following the directions from Internet Explorer to fix the problem, but that didn't work. It says "Internet Explorer cannot open this site." Why is my computer turning on me?! I'm so frustrated!