My computer swtiches to hibernation mode much too quickly, and I have to constantly hit a key or move the mouse to bring
back the screen. What can I do?
This is part of Windows Power Management. Access Power Management by clicking on Start / Control Panel / Performance and Maintenance / Power Options, and change the time next to the “Turn off monitor” option to the time you want. You have the choice of either adjusting time for the power supply or for the battery.