Installer Program running wild

We have a Windows XP Pro workstation with a problem.  After every boot up it looks as though a installer program is trying to run.  The Windows Installer screen flashes about every secord or so and says "Preparing to Insall" over and over again and never stops.  It is not a virus program, we did a scan of the system.  I ran the task manager and msconfig and stopped selective programs from starting but it wont stop.  I am running out of ideas.
Ray McGowanConsultantAsked:
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If you un check everything in start up and verify th start menu/startup is empty what does it do?

are there any listings in event viewer?

You might grab the office cleanup utility and see if there is an application that shouldnt be there and remove it.

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Hutch_77Commented: for the windows cleanup utility.
It is getting harder and harder to find since MS removed the utility.
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