Locate and double-click the device you want to update (your graphics adapter will be under Display adapters). To upgrade drivers manually, bring up the Device Manager as described above. (If you can recommend one, well, that’s what the comments section below is for.) Unfortunately, I’ve yet to find one that I can recommend. There are multiple programs and services available that can scan your PC and recommend updates for your various drivers.

After that, audio is the next likely culprit. Graphics drivers have a reputation for troublemaking, so check them first.

If your PC supports ACPI, and the appropriate options are turned on in the BIOS, try updating some of your drivers. Once you’re in the setup program, look for “Power” options. I can’t tell you how to access these settings on your particular computer, but if you watch the screen very carefully when you boot, one of the first things you’ll see will be a message like “Press F2 for setup.” That should give you a clue. If you don’t find these options in the menus, they’re probably turned off in the BIOS settings. Make sure the two pull-down menus have Hibernate and Sleep options. Click Choose what the power buttons do in the left pane. Vista and Windows 7: Click Start, type powercfg.cpl, and press ENTER. In the Power buttons box, check if the two pull-down menus have Hibernate and Standby options. In the resulting dialog box, click the Hibernate tab, and if Enable Hibernation isn’t checked, check it. XP: Click Start, then Run, type powercfg.cpl, and press ENTER. The next instructions vary with your version of Windows: Now that you know your hardware can handle power management, you have to find out if it’s configured to do so. If you don’t, your computer doesn’t support these power-saving features. You should see something with the acronym ACPI in its name. Double-click the word Computer to expand the section under it. Start by brinking up the Device Manager: Click Start ( Start, then run in XP), type devmgmt.msc, and press ENTER. First, make sure your computer supports the Advanced Configuration and Power Interface (ACPI).

My computer wont go into sleep mode