You said it was a work computer, are there any policies in place that could remove Office?
I have worked in a place where they picked some computers not to get Office installed and use Open Office instead. If you installed Office on one of those computers, the next time you logged on, the policy would execute and delete the Office setup.
Office 2010 should work under XP.
thankyou - since it took an AdobeAcrobat'11 FULL installation, I assumed
that the policies were not present. poor assumption.
you present an EXCELLENT explanation - I thank you again. will fuddle around - perhaps OO even has a policy, preventing dual install.