Vista to Windows 7 upgrade: Do I need administrator password?

My sister-in-law has forgotten her administrator's password on Windows Vista. I was going to reset her PC to factory this weekend. She also wants to upgrade to Windows 7. Do I need to have a current Vista administrator password in order to run the Windows 7 upgrade? Or can I skip the "restore to... show more My sister-in-law has forgotten her administrator's password on Windows Vista. I was going to reset her PC to factory this weekend. She also wants to upgrade to Windows 7.

Do I need to have a current Vista administrator password in order to run the Windows 7 upgrade? Or can I skip the "restore to factory" step, and just run the Windows 7 upgrade?
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