Reset your computer
If everything else fails, then you can select the reset computer option. This factory reset method may remove some computer data including the cause of the problem. Here, you need to follow this process or get help from computer officials.

Restart your computer and on the sign-in screen press Shift and click the power button.

On the next screen, select the troubleshoot option followed by Reset this PC.

Choose to keep your files or remove everything and click the Reset button.

Now, PC will reboot and run on the default settings.

Tapping on Account Sync gives a list of Google apps when they had been last synced. For immediate assistance, contact Google Live Support.

1. Change date & time of your device and check if this works. Even if date and time of your device are correct, then also go through following procedure:
2. Open Settings App of the android device.
3. In the Settings app, you need to tap on System.
4. Under the option System, click on Date & Time.
5. Scroll through and turn off the options Automatic Time Zone and Automatic date & time.
6. Change date and time so that it shows that both are wrong.
7. Once you have set wrong date and time, go to home screen.
8. Again, go to Settings app, and correct wrong date and time.
9. Turn on the options Automatic date & time.
10. Again, turn on the option Automatic Time Zone.
    If above troubleshooting method does not help, then, contact Google Live Support to make your account work again.
    Visit: Google Account Recovery