Before making any system changes set a restore point.
To create a Restore Point Access the System Restore Wizard through Help and Support Center. Click Create a restore point, and then click Next. In the Restore point description box, type a name to identify this restore point. System Restore automatically adds to this name the date and time that this Restore Point is created. To finish creating this restore point, click Create. To cancel restore point creation and return to the Welcome to System Restore screen, click Back. To cancel restore point creation and exit the System Restore Wizard, click Cancel.

Notes
To access the System Restore Wizard, click Start, and then click Help and Support. Click Performance and Maintenance, click Using System Restore to undo changes, and then click Run the System Restore Wizard. Creating a restore point can be useful any time you anticipate making changes to your computer that are risky or might make your computer unstable. To view or to return to this restore point, from the Welcome to System Restore screen of the System Restore Wizard select Restore my computer to an earlier time. Then select the date when the restore point was created from the calendar in the Select a Restore Point screen. All of the restore points that were created on the selected date are listed by name in the list box to the right of the calendar.
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Folders can contain many different types of files, such as documents, music, pictures, videos, and programs. You can copy and move files from other locations, such as another folder, computer, or the Internet, to folders you create. You can even create folders within folders. For example, if you are creating and storing files in the My Documents folder, you can make a new folder within My Documents to contain the files.