Outlook experienced a serious problem with the mcafee email scan add-in

Not sure this will help, but it won't hurt.

Try deleting Outlook's cache file, Extend.Dat.

    del /f /s /q "%UserProfile%\Extend.Dat"

    del /f /s /q "%UserProfile%\..\Extend.Dat"

    del /f /s /q "%AllUsersProfile%\Extend.Dat"

Do this when Outlook is not open, and when logged in with access rights needed to delete these files.

When Outlook restarts, it should rebuild a new version of this file automatically.

I am wondering if Extend.dat has been corrupted.

Let us know if this helps.

Ron Metzger

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