if your computer seems to shut down slowly (or not at all) or start up slowly, or if it doesn't enter power-saving modes, it's possible that a program or device driver is interfering with Windows power settings. You can use Performance Information and Tools to try to detect these programs or device drivers.
To check for performance issues
Open Performance Information and Tools by clicking the Start button Picture of the Start button, and then clicking Control Panel. In the search box, type Performance Information and Tools, and then, in the list of results, click Performance Information and Tools.
In the left pane, click Advanced tools.
In Advanced Tools, under Performance issues, click any issues that are listed.
Read the information in the dialog box that appears to learn which programs or drivers are causing problems.
If a program or driver prevents your computer from turning off quickly
You can try the following tasks to fix the problem:
Close the program before shutting down. It's possible that the problem occurs only if the program is running. Try closing the program before shutting down Windows, and then see if your computer turns off properly.
Check with the manufacturer of the program or driver for an update. A newer version of the program might include a resolution to the problem.
If these options don't solve the problem, then the program or driver might be incompatible with Windows. If you installed the program or device yourself and you no longer use it, consider removing the device, or uninstalling the program or driver.