I have never used 'Webroot Security', so I can't comment on its behaviour. That said, some anti-virus suites have been known to cause strange system behaviour. the fact you needed to uninstall and reinstall 'Webroot Security' suggests you have had some system issues. If your system is corrupt, you may be able to fix it with a repair install; otherwise you may need to completely reinstall everything from scratch. Make sure you create backups of all your data files first.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]