Earlier we wrote about how Microsoft used a kind of blind taste test to get die-hard Windows XP users to try Vista — and that they even liked it. They were told that they were trying a new OS, called Mojave. We also said that Microsoft hadn’t figured out a marketing campaign, but it appears that’s changed.Microsoft last week interviewed XP users who were skeptical of Vista and showed them what it called a secret new version of Windows, “Mojave.” It was in fact Vista. The results, according to Microsoft executives,