Easily restore Windows services to default settings with a web app
Services in particular can be a big pain to reset, simply because of how many their are. Fortunately, there's an incredibly handy web app which makes the process a whole lot easier.
Serviceseditor.com supports Windows XP, Vista, and Windows 7. Click the appropriate version, and you're presented with a comprehensive list of radio buttons covering all the built-in services. Scroll through the list and toggle any values you don't want set to the default Microsoft settings and press the submit button. You'll receive a .reg file which you can then merge with the Windows registry.
It's quite a bit faster than clicking through services.msc manually to get things back to normal and (obviously) doesn't even require an install. Slick!