Tip T1100 - Typically desktops donΓÇÖt need to use APM. Monitors donΓÇÖt need APM to shut-down, this is done using VESA/PM by the video adapter.
Fix: Unless youΓÇÖre actually using it, go to BIOS Setup\APM and disable it. If you are using it run the Control Panel\Add New Hardware Wizard to install the drivers for APM. If ACPI enabled you should disable APM.
For more information, please see the (FAQ).