Here's a nice list of things you can do to your machine to speed up Windows. Some are easy, some are obvious— some are not. Most importantly, most are quite safe. Disabling services can sometimes be wonky, but that's about as extreme as this one gets. One nice tip out of the bunch: getting rid of those delete confirmation messages. Just nice to get that one turned off finally. Once you're ready, check out the legendary Black Viper Services Configuration page.