Hi Andy,

If some of the PCs have that option set and others don't, then any potential interaction with existing add-ins should already be evident.

Note: I wasn't saying to activate that setting on all PCs - only to check whether the problem PCs have it set the same as the ones that don't have the problem. If they're different, then changing the setting on the problem PCs may resolve the problem.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]