I am unsure if this is computer related or what so I am hoping someone can help me out.

I have two sites that I add to every single week. Since a few weeks, one of them won't allow me to edit posts using Chrome. If I change to Firefox it is fine. If I use Chrome, anytime I edit a post, I get this under the Text tab, it adds this "text":

<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>

If I switch to Visual to Text, every time, that text is multiplied. In the end, I cannot edit the post at all.

I tried on another browser (Firefox), it works fine. If I try on another computer, even on Chrome, it works fine.

I am using Microsoft Security Essential, and scan every night. So I am unsure if this is a computer issue or other, and if it is a computer issue, what it might be.

Can anyone help me out?

Thanks.