If the risks above make you nervous, consider these :
Microsoft offers on third-party key sites like StackSocial or CDKeys for as low as $20-$30. These are legitimate, single-use keys. Add the official ISO from Microsoft, and you have a safe, preactivated (via legal key) system without the crack. Microsoft Office 2013 64 Bit Preactivated Download
Office 2013 introduced several modernizations that set the stage for current productivity tools: If the risks above make you nervous, consider