Hello my name is***** will be assisting you today. I am sorry to hear that you are having such trouble. I will try my best to help you.
Sir when you say reboot do you mean reset/restore the PC ?
How do you open this email usually, is it using any email client like Microsoft Outlook,windows live mail Or using web browsers like Internet explorer, Mozilla, Google Chrome?
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Thank you for the details.This is computer category so i will open this question to experts who handles android/smartphones,when another expert replies you will get a email notification and you can continue from there.I apologize for the inconvenience.
Hi there and welcome
Go to Settings, Accounts, click on Google and you can add it again there
Let me know how you go please.