Office Web Apps provides storage “in the cloud” that you can access whenever you have a connection to the Internet.
To access your documents sign in at http://skydrive.live.com. Go to the folder where your document is stored, and then click the name of the document.
Once the document is open, you can edit it by clicking Edit in Browser. If you want to make more extensive changes and you are working at a computer that has the Office desktop applications installed, click the command to open the document in the appropriate desktop application (Open in Word, Open in Excel, Open in PowerPoint, or Open in OneNote).
You can use the web browser on your computer (Internet Explorer, Firefox, or Safari work best), but you can also use the browser on your smartphone to sign in. If you are using a smartphone you can view Word, PowerPoint, and Excel documents in the phone’s web browser.
For more information about how to use Office Web Apps see Introduction to Office Web Apps.