How to determine the APM version
Updated: 01/24/2018 by Computer Hope
To determine the version of APM (Advanced Power Management) in Windows click Start, Settings, Control Panel, double-click the icon System and click the Device Manager tab. Within Device Manager click the + next to system and double-click Advanced Power Management.
If you are running Windows 95 and do not have Advanced Power Management, you must install Power Management support on your computer.
If you are running Windows 98, you may need to double-click Intel xxxxx Power Management Controller.
Once in Advanced Power Management, click the Settings tab and there should be an APM version listed.