Please help me find scientific literature, articles and links to web
pages which taking up the issue about patching and upgrading computer
systems. The focus should be on the user of the system and what
problem he will suffer, for example reboots, changes of interface and
so on.  The links to the information should be from a HCI (Human
computer interaction) perspective.

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Clarification of Question by process-ga on 06 Sep 2004 03:07 PDT

Thanks for taking your time. I know that users experience problems
after updating their systems, Im looking for articles that proofs
those problems, in a more scientific way. Learning curve is one of the
problem that might occure.

Do you mean "learning curve" issues after such upgrades?