Microsoft Office 2013 Software Professional 2013 retail pack with DVD 32bit/64bit Install or reinstall Office Home and Student 2013, Office Home and Business 2013, or Office Professional 2013 (one-time purchase of Office) Step 1: Sign in to My Office Account to begin installing Office 2013 1 . Go to My Office Account at www.office.com/myaccount. If you're not already signed in with the Microsoft account associated with your copy of Office do that now. If you're signed in with