ptilsen wrote: » Do one exam at a time. There is very little overlap between the exams. The exception is 70-680, which has some overlap with all other exams as it tests on Windows 7 features that work with Server 2008 R2. The 70-642 is a good enough starting point. Complete that, then 70-640, 70-680, 70-643, and 70-647, in that order. Depending on your real-world exposure and study habits, you will probably need anywhere from 20 hours to 80 hours of study time per test.