WIndows 8 issue - The computer does not shutdown on the power button

HI Joseph, Shijo,

Thank you for bringing up this issue on Microsoft community!

 I will guide regarding this issue.

Thank you for the post. I am sorry to hear that you are unable to shut down your laptop.

I can imagine the inconvenience you have experienced. I will certainly help you with this.

What is the make and model of the computer?

If you have an external SD Card reader or flash drive connected to the computer, unplug the card reader and try to shut down the computer.

If that does not fix the issue, follow these steps and check.

 Method 1: From the Modern "Start" page type "Shutdown Settings"
a. Click the "Settings" Icon on the right of the screen.
b. Click "Change what the power buttons do" on the left of the screen.
c. Click "Change settings that are not currently available"
d. Scroll to bottom of Dialog box.
e. Uncheck the box titled "Turn on fast startup (recommended)."
f. Click "Save Changes" button.
g. Exit Power Options Dialog box from that one.
 
Method 2: Perform full shutdown of the computer using this command.
Press windows key+ R and type the following command in run prompt.
Shutdown /s /t 0

Method 3: Perform clean boot and check.
You may perform a clean boot to check if any third party application is causing the issue.
Step 1:
a) Press the ‘Windows + R’ key on the keyboard.
b) In the ‘Run’ windows type ’MSCONFIG’ and click ‘Ok’.
c) Click the ‘Boot’ tab and uncheck ‘Safe Boot’ option (if checked).
d) On the ‘General’ tab, click to select the option ‘Selective startup’, and then click to clear the option Load startup items check box.
e) On the ‘Services’ tab, click to select the ‘Hide all Microsoft services’ check box, and then click ‘Disable all’.
f) On the ‘Startup’ tab, click ‘Open Task Manager’. In the Task Manager window under startup tab, right click on each startup item which are enabled and select ‘Disable’.
f) Click ‘OK’, and then click Restart.
Now try to shutdown the computer.
Step 2: Enable half of the services
a. Follow steps 1a and 1b to start the System Configuration utility.
b. Click the Services tab, and then click to select the Hide all Microsoft services check box.
c. Click to select half of the check boxes in the Service list.
d. Click OK, and then click Restart.
Step 3: Determine whether the problem returns
if the problem still occurs, repeat step 1 and step 2. In step 2, click to clear half of the check boxes that you originally selected in the Service list.
If the problem does not occur, repeat step 1 and step 2. In step 2, select only half of the remaining check boxes that are cleared in the Service list. Repeat these steps until you have selected all the check boxes.
If only one service is selected in the Service list, and you still experience the problem, the selected service causes the problem. Go to step 6. If no service causes this problem, go to step 4.
Step 4: Enable half of the Startup items
If no startup item causes this problem, a Microsoft service most likely causes the problem. To determine which Microsoft service may be causing the problem, repeat step 1 and step 2 without selecting the Hide all Microsoft services check box in either step.
Step 5: Determine whether the problem returns
If the problem still occurs, repeat step 1 and step 4. In step 4, click to clear half of the check boxes that you originally selected in the Startup Item list.
If the problem does not occur, repeat step 1 and step 4. In step 4, select only half of the remaining check boxes that are cleared in the Startup Item list. Repeat these steps until you have selected all the check boxes.
If only one startup item is selected in the Startup Item list, and you still experience the problem, the startup item that is selected in the list is the service that is causing the problem. Go to step 6.
If no startup item causes this problem, a Microsoft service most likely causes the problem. To determine which Microsoft service may be causing the problem, repeat step 1 and step 2 without selecting the Hide all Microsoft services check box in either step.
Step 6: Resolve the problem
After you determine the startup item or the service that causes the problem, contact the program manufacturer to determine whether the problem can be resolved. Or, run the System Configuration utility, and then click to clear the check box for the problem item.
Step 7:
Note: After you have finished troubleshooting, follow these steps to boot to normal startup.
a) Press the ‘Windows + R’ key on the keyboard.
b) In the ‘Run’ windows type ’MSCONFIG’ and click ‘Ok’.
c) On the ‘General’ tab, click the ‘Normal Startup’ option, and then click ‘OK’.
d) When you are prompted to restart the computer, click ‘Restart’.

I would suggest you to perform to Chkdsk.

Disclaimer:

While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost.

Please post back if you have any questions. I will be glad to provide you with the additional options available that you can utilize to get the issue resolved.