How to manage your desktop with Windows 7 go to: http://www.microsoft.com/windows/explore/new-desktop.aspx
How to change your Windows 7 style: http://www.microsoft.com/windows/explore/personalize-pc.aspx
Working with Windows 7 taskbar: http://www.microsoft.com/windows/explore/new-with-windows7.aspx
Microsoft Security Essential is a freeware security solution that's better than many other paid solutions.
the following link is about a video on how to manage your windows files and folders using windows libraries on windows 7.
Live mesh is an online service from Microsoft to synchronize your files online on the cloud. The service allows 5GB to be uploaded online for free. No registration needed, it can be accessed by your live account (your email e.g. someone@hotmail.com or someone@live.com). You can use it as an online backup service and can access your files from anywhere on the planet if you have internet connection. It supports multiple devices including your cell phone. You can also share you files and photo with your friends. For more information go to:Live Mesh Beta
