How to Get a Computer Out of Hibernation
Windows-based computers have two different low-power states that they can enter when they are not being used: standby and hibernation. When the computer is taken out of standby or hibernation by pressing the power button, the computer returns to the state that it was in before it was turned off. Hibernation consumes no battery power, but consumes hard drive space equivalent to the amount of RAM in the computer. Because the hibernation file remains on the computer at all times, disabling hibernation is an excellent way to reclaim several gigabytes of hard drive space.
Windows 2000 and XP
Press the Windows logo and "R" keys simultaneously to display the "Run" dialog box. Type "powercfg.cpl" without quotation marks into the box and press "Enter." The Power Options window will appear.
Click the "Hibernate" tab and remove the check from the box labeled "Enable hibernate support" in Windows 2000 or "Enable hibernate" in Windows XP.
Windows Vista and 7
Click the "Start" button and type the word "command" into the search box at the bottom of the Start menu.
Right-click "Command Prompt" on the list of results and click "Run as Administrator."
Type "powercfg /hibernate off" and press "Enter." No confirmation is displayed by Windows during this process. However, hibernation is disabled.