Login to my Gmail from Window Mail

From the question, it is understood that you want to change the login password for your Gmail account. If this is the case, you can refer to the following link for instructions:
https://support.google.com/mail/answer/41078?hl=en

GuruAid.com

Contact gmail (on the login page) stating you forgot your password. Then follow up suggestions (they will ask a lot of questions then will send confirmation to your alternative e-mail that you provided during registration process)

To do that log into the web client, at Gmail. An mail in your outbox on your pc or phone will want to send.

once you logon to your account read the following page

How to Create Desktop Shortcut for Easier Access to Gmail eHow

Maybe, try setting-up a second Gmail account, then send transfer) your emails from the old username account to the new username account. If this works, then either try deleting the messages from the old gmail account and transfer the messages from the new gmail account back to the original gmail account ... or ... just delete the old gmail account if you successfully transferred them to the new gmail account.

on your notebook, go to mail.google.com and sign in with your login info.

Open website One account All of Google and login using user name and password then click on login else click on create account and fill form then click on submit .

go to mail, and gmail should be there. if not type it in at safari

Signing in to your Gmail account gives you access to your email messages.
Gmail Web-based email functions as most email services do, with the option for users to send and receive email messages, store contacts and organize messages.

You can opt to store your Gmail login information when signing in so that you do not need to re-enter it each time you access your email.You can access your Gmail account on a computer or a mobile phone.

Open a Web browser window.
Click the address bar and enter "gmail.com." Press the "Enter" key.

Enter your Gmail username and password in the indicated fields.
Check the "Stay Signed In" box to save your username and password for future logins.

Click "Sign In" and wait for your Gmail account to load.

https://accounts.google.com/ServiceLogin?service=mail&continue=https://mail.google.com/mail/&hl=en

It has been said today that Google accidently wiped out a number of accounts. It's certainly possible your account was affected by this, as they are trying to restore it now.