I have just purchased MS Office 2013 Pro and tried to install it on my PC which already has MS Office 2007 Pro installed. I want to keep 2007 because I have numerous 2007 MS Access programs that I maintain. When I tried to install 2013 it tells me I can't load the 64 bit version because of the 2007 32 bit version. Is there a way around this or do I need to install the 32 bit version of Office 2013? What are the drawbacks of using the 32 bit version of Office 2013?