How do I upgrade Windows XP on my Mac?

Episode 1088 (1:42:47)

Mike from Denver, CO

Mike has an old Mac that he dual boots with Windows XP. He wants to upgrade to Windows 7. Leo says to get the upgrade and it'll install on top of it. Use the Windows 7 upgrade install disc to wipe the partition, and then install it. Mike is wondering whether it will preserve his data, though. Leo says no. He should make sure he backs up his data first.