Download this file: Microsoft Works; try to use it to repair any install then reattempt the update.
The update asks for the installation CD.  Of course I don't have it as it was pre-installed on my computer Hybrid 140g. Is this file on my hard drive someplace that I so far have not been able to find? Is this an MS problem or a Dell problem or just MY problem?
MS Works 9 update needs works9.msi