Adobe Reader 9 often/commonly/always leaves an Adobe Reader Installer folder on the desktop. I could find no reference to it in the KnowledgeBase, and I have seen conflicting answers in the forums about whether this is normal and about whether the folder can be moved or deleted. Some threads indicate that Reader should remove this folder on its own during a completely successful installation. Others say that the folder is required for updates or uninstalls.
Can anyone address this issue with certain knowledge and authority?
Is that a theoretical question, or do you actually have that problem? If so, on what OS / environment?
You should be able to remove it.
I'm not sure of any applications that would install files critical to updates (or anything else for that matter) on your desktop. Mac or Windows.
Not that it doesn't happen but it would be bad practice.
"Is that a theoretical question, or do you actually have that problem? If so, on what OS / environment?"
I have actually seen this on a number of real, live (well, working) PC's, mostly XP as far as I recall (and certainly XP in the latest case).