Office 2007 Prof. constant crashing

Many components of Office 2007 Prof. keep crashing, i.e. Outlook [at least 10
times a day], Word [several times per day], Power Point.
My computer is up to date and has excellent firewall and virusscanner.
Ran Diagnostic Tools: no problems found.
Cleaned registry: no difference.
Contacted Microsoft Holland: no real help there.
In the mean time the problem is getting worse.
Can anyone help me with a solution please?
--
Scholte
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