Setup has detected previous versions of this product on your computer. Setup can't continue while these are installed. Please ...

Setup has detected previous versions of this product on your computer. Setup can't continue while these are installed. Please remove the previous version before restarting this version's Setup program. If you want to upgrade your existing content and services, you should review the upgrade documentation to determine the correct process to use for your environment. The upgrade documentation is available here: http://go.microsoft.com/fwlink/?LinkId=235886