Black+Screen+After+Unlocking+Your+PC


 * Black Screen After Unlocking Your PC **

If your Windows 7 system is running Aero and you leave the machine for long enough for the screen to go black (20 minutes using the default Balanced power mode settings), you may find that when you come to wake the machine, the screen stays black. After about 10 minutes the screen will eventually come back to life.

This problem occurs when a piece of security software installed on your computer conflicts with the Desktop Window Manager on Windows. To cure this problem, first of all try installing the latest graphics driver from your PC manufacturer.

If that does not work, you will have to work around the problem. To do this you need to stop and disable the Desktop Windows Manager Session Manager service. This process will also stop the Aero graphics effects too. How to apply :-


 * 1) Click the **Start** button, type **SERVICES.MSC** and then press the [**Enter**] key.
 * 2) Locate and then double-click the **Desktop Window Manager Session Manager** service.
 * 3) Click on the **Startup type** drop-down list and change the value to **Disabled**.
 * 4) Click on the **Stop** button.
 * 5) Click the **Apply** button, and then click the **OK** button.