Hi there,

Many of our users have MS Access created SharePoint lists (In our current SP 2010 site).

Before we upgrade to SharePoint 2013 - are there any installations needed for MS Access/Excel/Word etc on users' machines?

Thank you so much.

No.  My customer organization has deployed Office 2010, which has been in use for three years.  Last year, I upgraded the customer SharePoint instance from 2010 to 2013, without consideration of deployed desktop office instances.  To date, all users have been able to continue working with SharePoint 2013 and their existing uploaded Office 2007 and Office 2010 files without issue.  Office Web Apps 2013 also has no difficulty presenting Office 2007 and office 2010 documents online. My customers do not generally work with Access applications.  However, I have successfully tested deploying Access online to SharePoint without issue.

HI,Its not required to upgrade anything in the users systems.what ever the features which are compatible with the sharepoint 2013 will work on users systems.