Solution:
A number of things can cause your computer to not enter Standby mode. Most often a hardware device driver is the culprit. Check that your video card’s drivers are up-to-date. The best way to update your video drivers is to browse to your video card manufacturer’s Web site, download the latest driver, and install it. Most manufacturers distribute their device drivers in self-extracting executable files, so installing the driver is as simple as double-clicking the downloaded file and following the instructions to complete the installation.
Of course, other hardware drivers may be responsible for your power management woes. Unfortunately, the best way to resolve the problem is to disable hardware devices one by one and then try to enter Standby or Hibernate mode with the device disabled. By doing this, you can isolate the hardware device that is wreaking havoc on your PC’s power management. When you find the device that is responsible for your trouble, obtain and install the latest drivers. If replacing the driver for a problematic device does not work, you may have to disable the device or replace it with a newer model. The moral of the story is that to ensure you have trouble-free power management, maintain all your PC’s hardware components equipped with the latest drivers.
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