Angels have the Phone Box
Drat! That Fast Startup trick usually resolves quite a few issues. Let's first concentrate on the shutdown issue. Okay, a few questions please:
1. Did you experience any issues when upgrading at all?
2. What programs have you installed on the machine? Anything like ONOFF by Gigabyte? (Feel free to post the text file from Ccleaner. If you don't know how to do that, please ask.)
3. What external devices (if any) do you have connected to the laptop, and do you have any of them set to "do not allow the computer to sleep" them? Were any of them connected during the upgrade?
4. Does the laptop sleep/hibernate successfully, or do you have problems with that as well?
5. Is all your data backed up?
6. Does the OS show as "activated"? Settings>Update & Security>Activation
7. Please have a look in your update history and see what driver updates (if any) have been installed.
Settings>Update & Security>Advanced Options>View your update history
8. Please post screenshots of your power settings regarding "when I close the lid" and "when I press the power button". We may want to completely disable any sleep, hybrid sleep (Fast Startup), hibernation functions.
9. Does the problem also happen in Safe Mode?
10. Is your BIOS up-to-date?
11. Do you have an OEM BT (bluetooth) suite installed? If so, try uninstalling it, force shutdown, and let Windows Update install a BT driver upon restart.
Please try this and tell me if it makes a difference:
Close all open programs.
Open a command prompt and type shutdown /p and press enter.
(Notice the space before the forward slash.) This performs a full shutdown, but will stop if there are any unsaved jobs and will prompt you to save them. Report back the results.
Depending on your answers to the above questions, we may have to try a clean install. This is why I need to know if all your data is backed up, and your system is indeed activated. Once W10 is activated, you can clean install as many times as you want/need.