Eviltree

I cleared cookies, deleted files, cleared history before, and all other history was gone, but I think this one is sneaky, this IE doesn't have 'clear all' on privacy. is there any more info on that bug?

**Edit, did everything that tenchi069 said, and still they are there. I turned off autocomplete for webpages as a temporary fix, but it makes it look even more suspicious. Also, it does not show up in the dropdown bar when it is on some other site, only when you type the first letter, which is 'm'. I searched for the stuff, and it showed up, when I tried to delete it, it said, cannot read from file or disk. I restarted, they're gone, but my problem still remains. Maybe I deleted them wrong, and they are invincible now.