Disable Power Management on Windows 7 or Vista

Windows Vista has a neat new aspect for laptops called “hybrid sleep”. In fact, Windows Vista and windows 7 has a neat new feature for laptops called sleep too, so I am getting ahead of myself a spot.

Hybrid sleep saves the Operating system state into Random Access Memory, but it also writes it all to the hard drive as well (sort of like hibernate do). This ensures that even if power is lost, the data will remain. This all sounds like a good thought, but in practice it is just as slow as standby is.
Now, laptops have batteries and most of them are configured to enter hibernate when the battery dips below a certain level. This means that except the battery is physically removed, power to the Random Access Memory is never unexpectedly cut. Thus, we do not actually need the hybrid sleep feature. Unluckily, giving hybrid sleep the pink slip is a little harder than it might be.

So you are using a desktop PC, probability you do not want the computer to go to sleep automatically. This is even more the case if you are running Windows 7 or Vista in a virtual machine for testing purposes.

Disabling Power Management in Windows 7...

Begin by clicking on the power icon, and open up the more power options. Under the “Additional plans” section, select High Performance, then “Change plan settings”.
Then change everything to “Never”, and save the changes.

Disabling Power Management in Vista...

Disable power management is simple and easy. First go to the start menu and click on the Control Panel. Click on the System and Maintenance link.
Then click on the Power Options link. Then select High Performance.  This will disable the automatic sleep mode, but will still turn off the display. You can click on Change Plan Settings to disable that as well if you want.

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