Screen savers are used to protect the contents on a screen while the user is away from the computer. The timeout on your screen saver is the amount of time it takes for the screen saver to kick on while the system is left unattended. If you want to change your screen saver timeout, you can use the Windows Registry Editor. The Registry Editor will give you access to the registry, which will give you complete control over the screen saver timeout.
Open the "Start" menu, then click the "Run" box from the menu. Type "Regedt32" into the Run box and press the "OK" button. This will open the Registry Editor.
Click the "HKEY_USERS" key, followed by the ".DEFAULT" key, the "Control Panel" key and then "Desktop."
Double-click the "Screen Saver Timeout" option from the right side of the menu.
Click on the "Edit String" menu when it appears on the screen. Type the number of seconds that you to designate for the timeout. For instance, if you would like to designate one minute for the timeout, type "60" into the field.
Click "OK," then click "Exit" from the "File" menu at the top of the window to exit the software.
This procedure works in Windows XP, Vista, and Windows 7.