What do you use to clean your registry and other unwanted crap? I use CCleaner v 1.23 and is so good i recommend people to try it'  Its free and better than anything i used before.If interested let me know and I'll give you the link.

check out what it did for me when i thought my computer was completely clean'

The pic u included gives results for IE and Windows cleaning.. That stuff (cookies, downloaded files, history of apps,etc) should be cleaned out periodically to prevent it from building up.. There are many free programs that do that (including CCleaner)