It's a lot of work to manually delete Office 2000, but it is possible to
do. The following procedure was provided by a Microsoft person some
time ago in one of the Office newsgroups:
1. Download and install the Windows Installer Cleanup utility from
http://support.microsoft.com/?id=290301
2. Run this utility and check if Office 2000(or other Office version) is
listed.
3. Select Office Products and then click Remove.
4. Click Start, and then click Run.
5. In the "Open" (without the quotation marks) box, type "regedit"
(without the quotation marks), and then press ENTER.
WARNING: If you use Registry Editor incorrectly, you may cause serious
problems that may require you to reinstall your operating system.
Microsoft cannot guarantee that you can solve problems that result from
using Registry Editor incorrectly. Use Registry Editor at your own risk.
6. Backup the entire registry and then rename or delete the following
registry keys if present:
(Note: '#' represents any number {0-9, A-F})
HKEY_CLASSES_ROOT\Installer\Components
HKEY_CLASSES_ROOT\Installer\Products\904###0900063D11C8EF10054038389C
HKEY_CLASSES_ROOT\Installer\Features\904###0900063D11C8EF10054038389C
HKEY_CLASSES_ROOT\Installer\Patches
HKEY_CURRENT_USER\Software\Microsoft\Installer\Components
HKEY_CURRENT_USER\Software\Microsoft\Installer\Features\904###0900063D11C8EF10054038389C
HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\904###0900063D11C8EF10054038389C
HKEY_CURRENT_USER\Software\Microsoft\Installer\Patches
HKEY_CURRENT_USER\Software\Microsoft\Office
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Installer\Products\904###0900063D11C8EF10054038389C
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Components
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Features\904###0900063D11C8EF10054038389C
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Patches
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\904###0900063D11C8EF10054038389C
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\Products\904###0900063D11C8EF10054038389C
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-#-#-##\Products\904###0900063D11C8EF10054038389C
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\<GUID>
OFF2000: GUID = {0#0#0409-78E1-11D2-B60F-006097C998E7}
OFF2002: GUID = {9###0409-6000-11D3-8CFE-0050048383C9}
OFF2003: GUID = {9###0409-6000-11D3-8CFE-0150048383C9}
7. Open Windows Explorer.
8. On the Tools menu, click Folder Options (or, click Folder Options on
the View menu), and then click the View tab.
9. Click to select the "Show hidden files and folders" check box (or
click to select the "Show all files" check box), and then click OK.
10. Rename or delete the following folders
C:\Program Files\Microsoft Office
C:\Program Files\Common Files\Microsoft Shared\Office9
C:\Program Files\Common Files\Microsoft Shared\Office10
C:\Program Files\Common Files\Microsoft Shared\OFFICE11
C:\Documents and Settings\<UserName>\Application Data\Microsoft\Office
C:\Documents and Settings\All Users\Application Data\Microsoft\Office
C:\Program Files\OfficeUpdate
C:\Program Files\OfficeUpdate11
11. To remove MAPI, search for and rename the following files/folders:
C:\Windows\system32\mapi32.dll
C:\Windows\system32\mapisvc.inf
C:\Program Files\Common Files\System\Msmapi
C:\Program Files\Common Files\System\Mapi
In Office 2003, MAPI components are installed to the following folder:
C:\Program Files\Common Files\System\Msmapi
In Office 2002, MAPI components are installed to the following folder:
C:\Program Files\Common Files\System\Mapi
12. Delete contents of %temp%
