I currently have Microsoft Office 2013, however for one of my college courses we are required to use Microsoft Office 2010. I obviously do not want to have to replace 2013 with 2010. Also, the disc for 2010 is only a 180 day trial. Can I use both versions on my computer at the same time, or would using the 2010 180 day trial get rid of my already installed Office 2013?

Thank You