Computer Won't Sleep

When I try to engage sleep, error message says that there is a driver problem. Anyone have a suggestion? Thanks!

 

what is the make, model, and model number of pc?

laptop or desktop?

most issues are the display driver, a program that is still on in the background such as itunes or similar will keep pc out of standby.

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from Kelly's Korner:

Standby
http://web.archive.org/web/20131027142524/http://www.kellys-korner-xp.com/xp_standby.htm

To automatically put your computer on standby

1.. Open Power Options in Control Panel.
2.. In Power Schemes, click the down arrow, and then select a power scheme. The time settings for the power scheme are
displayed in System standby, Turn off monitor, and Turn off hard disks.
3.. To turn off your monitor before your computer goes on standby, select a time in Turn off monitor.
4.. To turn off your hard disk before your computer goes on standby, select a time in Turn off hard disks.

Notes

a.. To open Power Options, click Start, click Control Panel, and then double-click Power Options.
b.. You might want to save your work before putting your computer on standby. While the computer is on standby, information in computer memory is not saved to your hard disk. If there is an interruption in power, information in memory is lost.
c.. To create a new power scheme, specify the time settings you want, and then click Save As.
d.. If you're using a portable computer, you can specify one setting for battery power and a different setting for AC power.
e.. To put your computer on standby, you must have a computer that is set up by the manufacturer to support this option.
f.. Using Power Options in Control Panel, you can adjust any power management option that your computer's unique hardware configuration supports. Because these options may vary widely from computer to computer, the options described may differ from what you see. Power Options automatically detects what is available on your computer and shows you only
the options that you can control.

To manually put your computer on standby

1.. Open Power Options in Control Panel.
2.. On the Advanced tab, under When I press the power button on my computer, click Standby. If you are using a portable computer, click Standby under When I close the lid of my portable computer.
3.. Click OK or Apply, and then turn off the power or close the lid of your portable computer.

Notes

a.. To open Power Options, click Start, click Control Panel, and then double-click Power Options.
b.. You can also put your computer on standby by clicking Start and then clicking Shut Down. In the What do you want the computer to do drop-down list, click Stand by.
c.. You might want to save your work before putting your computer on standby. While the computer is on standby, information in computer memory is not saved on your hard disk. If there is an interruption in power, information in memory is lost.
d.. To put your computer on standby, you must have a computer that is set up by the manufacturer to support this option.
e.. Using Power Options in Control Panel, you can adjust any power management option that your computer's unique hardware configuration supports. Because these options may vary widely from computer to computer, the options described may differ from what you see. Power Options automatically detects what is available on your computer and shows you only
the options that you can control.