Open Windows 10. Select the cog icon in the bottom left-hand corner, then select Manage Accounts from the right sidebar. Select your email account from the list. Select the Change mailbox sync settings option at the bottom of the page.
If you are unable to log in to your Comcast email account, it can be because you are entering the wrong password or you have forgotten your password or it can also be because someone hacked your account and changed your password