http://windows.microsoft.com/en-us/windows-live/essentials-install-offline-faq

Windows Essentials is a suite of products available in one easy download. Get them all at once, or choose just the ones you want.
- Mail: Manage multiple email accounts, calendars, and your contacts, even when you're offline.
- Family Safety: Help keep your kids safe online.
- Writer: Create stunning blog posts in minutes, with photos, videos, maps, and more. Then publish them to any of your favorite blog service providers.		
- Movie Maker and Photo Gallery
- Outlook Connector Pack: Manage Hotmail from within Outlook.
- Microsoft SkyDrive: With SkyDrive installed on all your computers, you'll have automatic access to the latest version of your files wherever you are.  

Windows Essentials 2012 system requirements

Windows Essentials 2012 requires the following: 
- Operating system: 32- or 64-bit version of Windows 7, or 32- or 64-bit version of Windows 8, or Windows Server 2008 R2.
- Processor: 1.6 GHz or higher with SSE2 support. SSE2 is supported on Pentium 4 processors or newer, and AMD K8 processors or newer. 
- Memory: 1 GB of RAM or higher 
- Resolution: 1024 × 576 minimum
- Internet connection: Online services require dial-up or high-speed Internet access (provided separately—local or long-distance charges might apply). High-speed Internet access is recommended for some features.
- Graphics card: Windows Movie Maker requires a graphics card that supports DirectX 9.0c or higher and Shader Model 2 or higher. For DirectX 9 hardware on Windows 7, go to Windows Update

Additional requirements
Some Windows Essentials programs have additional requirements.
Windows Photo Gallery and Movie Maker require some features of DirectX 10, which might be installed for you if they're not found on your computer.
Messenger video chat requires a webcam, a microphone, speakers or a headset, and high-speed Internet access. HD video chat requires a compatible HD webcam and a 2.0 GHz or higher processor. HD webcams might also have additional system requirements.

Note
To install or uninstall Windows Essentials programs, you must be logged on to the computer using an administrator account.