|riider is correct, the version of MS Office which came bundled with your laptop is not a fully licensed version. Its purpose is to determine the user to purchase a copy if he/she would like to keep using it.|
The only free and legal way that I can suggest you regarding the use of a MSO copy, is to either signup on MSDN with your uinversity ID if you are a student, or to use the Home Preview for Office 2013.
The only downside of this version is that it will also expire 60 days once the official version comes out. Other than that it's a full working version of the software and I'd say that you've got at least six months of usage before the license expires. There hasn't been an official announcement regarding the release date yet.