Download Microsoft Office 2013 (365 ProPlus) Preview

Get it here (official Microsoft Office 2013 full Download). 

http://technet.microsoft.com/en-US/evalcenter/hh973391

At the bottom of the page is the full download file (Office 2013).  Pay close attention to the note just above the download.  Does not support side by side operation with older versions of Office.  You will need to uninstall existing versions of Office.

As an alternative you can download/install the side by side version (Office 365 ProPlus) that will allow you to also have other versions of Office installed by clicking the “GET STARTED NOW” link.

 

Some other resources

System Requirements for Office 2013 Preview

http://technet.microsoft.com/library/ee624351(office.15).aspx

Microsoft Office 2013 Forum

http://social.technet.microsoft.com/Forums/en-us/officeitpropreview/threads

Project Professional 2013 Preview

http://technet.microsoft.com/en-US/evalcenter/hh973401

Visio Professional 2013 Preview

http://technet.microsoft.com/en-US/evalcenter/hh973399