There are a number of changes you should make to your computer before your use it to give a presentation. These include changing your desktop wallpaper to something impersonal and inoffensive, disabling your screen-saver and power saving settings, and ensuring that your volume is either up (if you have sounds in your presentation) or down (to avoid any incidental sound effects from disrupting you). You’ll also want to disable pop-up notifications from Windows and third-party software.
As I’ve previously written, the best way to contain all of these settings is to either have a dedicated computer for presentations, or to create a separate user profile just for presentation settings.
However, Windows Vista and Windows 7 make configuring presentation settings easier.
Press the Windows Key 
+ X, or type ‘Mobility’ from the start menu (and press enter) to launch the Windows Mobility Center.
Windows Mobility Center
From here, if you have not already done so, you can choose ‘Connect Display’ in order for your computer to detect an attached monitor, plasma screen, projector, or television, and configure it for use.
Once you have set up your display device, from the Windows Mobility Center, select ‘Turn On’ under the ‘Presentation Settings’ section in order to have Windows automatically change some of those all-important options as discussed above.
Presentation Settings