What an in-place Windows 2000 upgrade changes and what it does not change
This article was previously published under Q306952
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When you do an in-place upgrade of Windows 2000, some existing information and settings are changed, while other information and settings remain the same. This article explains what changes and what remains the same after an in-place upgrade.
Doing an in-place upgrade means installing a new version of a program--for example, Windows 2000--over an existing version of the program.
What an In-Place Upgrade ChangesAn in-place upgrade:
- Rolls back any hotfixes, service packs, and Microsoft Internet Explorer upgrades to their base versions.
- Refreshes the registry and restores default registry values.
- Reapplies default permissions.
- Reregisters Component Object Model (COM) components and Windows File Protection (WFP) files.
- Reenumerates Plug and Play devices, including the hardware abstraction layer (HAL).
- Reenumerates and changes drive letters, based on the current drives and partitions that are seen during the in-place upgrade and on the rules that are documented in the following article in the Microsoft Knowledge Base:234048 How Windows 2000 assigns, reserves, and stores drive letters
What an In-Place Upgrade Does Not ChangeAn in-place upgrade:
- Does not change the installed components and programs.
- Does not change any passwords.
- Does not change third-party registry entries.
- Does not change the role of the computer to be a member server. However, be very careful about performing upgrades on a domain controller. When it is possible, perform a system state backup, or have another domain controller seize the roles from the server as a precaution.
For additional information about user profiles, click the following article number to view the article in the Microsoft Knowledge Base:
224012 Using user profiles with WindowsFor additional information about performing an in-place upgrade of Windows 2000, click the following article number to view the article in the Microsoft Knowledge Base:
292175 How to perform an in-place upgrade of Windows 2000
Article ID: 306952 - Last Review: 12/06/2015 05:13:29 - Revision: 4.2
Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition
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