If Word 2000 didn't open eventually, repair Word 2000 from the Windows
Control Panel add or remove programs applet. Next start the Word version you
wish to associate with Word document files to reassociate the registry
entries.
Close Word (either version)
Edit the registry to have the installer ignore the 'switch' between
versions. While this will stop the installer on a regular (as you use the
apps) basis it's not clear at present what other areas this may affect when
switching between Word versions, including running a repair (Office 2000
thru 2003)/diagnostic (Office 2007) or when updates are applied.
Run the version of Word that you want to have associated with your .doc,
..dot, .docx, etc files, then close Word.
Double click, in Windows Explorer in My Documents or another folder a .doc
file to be sure it opens in the correct version you prefer to use then close
all running Office apps.
Use Start=>Run and type Regedit.
Navigate down in HKEY_CURRENT_USER to
\Software\Microsoft\Office
For Word 2007 (v12.0) continue to navigate through
\12.0\Word\Options
and once there right click on the 'Options' branch in the left panel and
create a new 'DWORD' named NoReReg , then set the value of NoReReg to 1.
For Word 2000 (v9.0), follow the same steps as in 2f, but use the area for
Word 2000, which would be
\9.0\Word\Options
Credit to fellow MVP Bob Buckland for posting this originally.
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Graham Mayor - Word MVP
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