Start service error 193 0xc1

I have recently installed a backup program which depends on a service
running.

I have checked the service and it is set to run automatically, but is
marked as stopped.

When I try to start the service manually I get the error message "Could
not start the xxx service on the local machine. Error 193 0xc1"

I have spent the best part of 2 hours searching Microsoft and other web
sites to no avail.

I have also tried another backup program which again depends on a
service running, with exactly the same result !

I am using XP Pro and I am logged in as a user with administrator
rights.

Anyone any ideas ?


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gtatler