Is there more to the error? That looks like a partial report.
105 is a common installshield fallthrough for many problems. I'd clear out the cache directory it listed, make sure you have lots of free disk space (on your system drive and the program files drive, etc.
You mentioned "all CD's", but is it that simple? This problem should only be affecting installshield which isn't used for everything. Can you at least disable autoplay and Explore to a more specific installer that works?
Can you tell us what the installer installs? If it's in-house, nevermind, but it might help us track down specifics.
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There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195
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