Operating System:
Windows 7, Windows Vista with Service Pack 1
Windows XP with Service pack 3
Windows Server 2008, Windows Server 2003 R2 with MSXML 6.0 or later (32 or 64-bit)

Hard Disk:
3 GB available space

Memory:
256 MB
1 GB for OneNote Audio Search

Other:
1024 x 576 or higher resolution monitor
Graphics hardware acceleration requires a DirectX 9.0c graphics card with 64 MB or more video memory
Internet functionality requires an Internet connection
Microsoft OneNote features require Windows Desktop Search 3.0, Windows Media Player 9, Microsoft ActiveSync 4.1, microphone, audio output device, video recording device, TWAIN-compatible digital camera or scanner
Advanced collaboration functionality requires connectivity to Microsoft SharePoint Foundation 2010 or to Microsoft Office SharePoint Server 2007
Send to OneNote Print Driver requires Microsoft .NET Framework 3.0 and Windows XPS features
Multi-Touch features require Windows 7 and a touch-enabled device
Inking features require Windows XP Tablet PC Edition or later
Speech recognition functionality requires a close-talk microphone and audio output device
The Desktop Experience feature must be installed prior to using OneNote on Windows Server 2008 or later
Note:
Online functionality requires a Windows Live ID
Audio Search not available in all languages
Grammar and contextual spelling features require 1 GB memory
Actual requirements and product functionality may vary based on your system configuration and operating system