I cannot get into my gmail account

Clear your browser history then login.

It does not matter what the MS operating system is on the other computer. Just find the login page for your email service on any computer connected to the internet and login to your account in the normal way.

there r too many options that will cause something like that.
best to delete the account and start over on her computer.

Sign out of her account by clicking her avatar in the upper-right then clicking "Sign out." You can then sign in to your account.

Each Gmail account ought to have its own password. Often, people let their software "memorize" the password, but after some time tend to forget what it was.

I set up my Gmail accounts to "POP" settings so that they actually "download" the incoming mail locally to my computer. This way I've got ALL the mail I want to keep ON my computer, meaning I don't have to use online access to Gmail to get it.

Go to Settings then Accounts then Click on the account you want to delete, scroll all the way down on the accounts settings page, and click on the remove account button

Point your web browser at http://www.gmail.com

If another account comes up, sign out of it by clicking the avatar in the upper-right then clicking "Sign out."

You can combine multiple Gmail accounts into a single, primary Gmail account by using the POP3 Mail Fetcher application built into Gmail.
The Mail Fetcher enables you to retrieve email from POP3 email accounts, including Gmail, and send mail as if from a different email address all from within your primary Gmail account. Configure your primary account to manage your other Gmail accounts with the Mail Fetcher.

Sign in to the Gmail account that you want to use to manage your Gmail accounts.
Click the "Settings" icon, represented by a gear cog, in the top left and click "Mail Settings."

Click the "Accounts and Import" tab.
Click the "Add POP3 Email Account" button.
Enter the email address of your secondary email account and then click "Next Step."
Enter the password of your secondary email account and then click "Add Account."
Click the radio button beside "Yes, I want to be able to send email as
[SECONDARY EMAIL ADDRESS]" and then click "Next Step."
Enter the display name for your secondary email address and then click "Next Step."
Click "Send Verification" and then check your secondary email account.
Click the link contained in the verification email to confirm the integration of that account with your primary Gmail account.
All mail sent to your secondary Gmail is now delivered to your primary account, and when responding your secondary Gmail address is displayed in the From section of the email.

Access all your gmail accounts

Bring up Gmail, click your username, then select "Sign out." You can only be logged in to one account at a time. You'll have to log out of one account and log in to the other each time you want to switch.

Alternatively, use two different web browsers. You can log in to one account with one browser, and log in to the other account with the other browser.

When you open the gmail webpage in your browser, look at the upper right hand side of the page where you will see the other users name. Click on the triangle next to the name and a drop down menu will appear. Select Sign Out and then re-log back in under your own account.