Office 365 - requirements

System Requirements for Office 365 Home Premium

Computer and processor: 1 GHz or faster x 86 or 64-bit processor with SSE2 instruction set
Memory: 1 GB RAM (32-bit), 2 GB RAM (64-bit)
Hard disk: 3.0 GB of available disk space
Display: 1024 x 576 or higher resolution monitor
Operating system: Windows 7, Windows 8, Windows 2008 R2 with .NET 3.5 or later
Graphics: Graphics hardware acceleration requires DirectX10 graphics card with 1024 x 576 resolution
Browser: Microsoft Internet Explorer 8, 9, 10 or 11; Mozilla Firefox 10.x or a later version; Apple Safari 5; or Google Chrome 17.x
Other: Internet functionality requires an Internet connection. Certain features require a Skype account. Product functionality and graphics may vary based on your system configuration. Some features may require additional or advanced hardware or server connectivity; www.office.com/products. Multi-touch features require Windows 7 or Windows 8 and a touch-enabled device.