Ah, good ol' Clippit (also known as Clippy). That was one of those ideas from Microsoft that was absolutely terrible. Clippy was almost universally hated and has been ridiculed since it showed up in in Office '97.
You've got to give Microsoft credit -- the company isn't afraid to try new things. Some of those new things turn out to be terrible, but at least the company is trying.
At least Clippy wasn't as annoying as the Metro interface in Windows 8. Ugh. There's another experiment that has been controversial -- some users love it, some hate it. I hate it, but have avoided the Metro interface by downloading a third-party app that gives me a start button (there are a ton of those apps out there -- just search the Internet and find one you like).