Several programs such as PDF viewers, Password Managers, Download Assistants and others that are somewhat susceptible to security problems mostly have an automatic update check enabled. Usually I get a message that a new version is available with the link to the website, but no particular update instructions.
So I wonder if there is a general rule for programs installed on Windows 7 and other versions how to update a software correctly. Is it ok to just download and install the new version? Do I have to uninstall the old version first? Does it depend whether it is a minor or major upgrade? Or do I have to find out for each program individually?
I only found specific instructions for a few software packages and while builtin updating software becomes more popular (Adobe Acrobat, Google Update for Chrome) there is still a large number of programs out there that 'just' checks for a new version and leaves the rest to you.