Core exams on client operating systems (choose one)

Exam 70-6206
Review the preparation guide for Exam 70-620: TS: Windows Vista, Configuring

Exam 70-270
Review the preparation guide for Exam 70-270: Installing, Configuring, and Administering Windows XP Professional

Exam 70-2101,2
Review the preparation guide for Exam 70-210: Installing, Configuring, and Administering Microsoft Windows 2000 Professional