Recap, I tried your suggestion but this had no effect. AndySD, the problem is not now with Acrobat but more general system problems to do with logging on (but I did reinstall Acrobat at the time of the original problems).
I don't know what to try next, perhaps there is something deep in the registry that is forgetting my network passwords/username and the printer mappings everytime that the machine is switched off.
I would add that everything else with the machine seems perfect.
Thanks for any further help.
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