Disabled Device Settings May Not Be Retained During Upgrade

Hardware devices that have been marked as disabled in Device Manager in Microsoft Windows 95 or Microsoft Windows 98 may be enabled when you upgrade to Windows 2000.

Because of the differences between the Windows 95/98 and Windows 2000 architectures, hardware detection and enumeration must be performed on all devices by Windows 2000. Therefore, all devices are detected during Setup, regardless of their status before upgrading.

This behavior is by design.