Heh, I just gave this tool a try. There are a couple interesting findings. There are "Performance" and "Power" tabs, one suggests a change to "Balanced" power scheme, the last suggests "Power Saver" scheme... And even if you do have something messy, you can 'fake' the main Fix It Center screen by pressing "Cancel". Now you're greenly checked.
Absolutely a beta tool. Didn't found anything interesting at all, as Windows 7 already has very good troubleshooting tools (at least way better than XP -- skipped Vista, thank you).
(If Microsoft ever allows one to set a "custom" wave to this tool when an issue is found, I would definitively put Mythbuster's Adam Savage "Now there's your problem" on mine)
Hah, a funny one from the tool: I ran the Printer fix, and the suggestion I got was to "Add a printer". I LOL'ed.