Login to my email

Changing you hard drive should not cause any problems for your gmail account, unless you were login into it with a saved password, and you don't remember it. If you do remember it, just go to Google, click the sign in button on the top right, enter the info and you should be able to get your email.l

In an article titled, "Email already exists," at: https://support.google.com/accounts/answer/69849?hl=en

Google Help advises:
If you see this message when you try to create or change your account username, it's possible that you've already created a Google Account with that username. It's also possible that someone else accidentally entered your email address when creating a Google Account, but was never able to verify email ownership.
To reclaim your Google Account, please follow these steps:

1. Visit the password-assistance page.
2. Enter your username (your full email address).
3. Type the letters shown in the distorted picture into the appropriate field.
4. Click Submit. You'll receive a message at the address registered as your Google Account username. Follow the instructions in this message to reset your password.

After you've regained access to this account, you can either delete the account, or change the username on the account to another valid email address. You'll then be able to change the email address on your other account to this email address.
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I hope this works for you!

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strange, it looks you are trying to re-register your own e-mail address? go to mail.google.com and login directly.

There is no list like the one you describe. Try going to https://www.google.com/accounts and selecting the "Need help?" link below the Sign In button and you may be able to retrieve your User ID there if you specified a backup email.

then you need to sign up for facebook and when it asks to enter the desired address then type there your gmail address

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

-Check if you have locked your CAP.
then try your password again.
-Did you type your email properly?
if not then well, you should type correctly.

Google started as a search engine and since has added many applications.
All these applications are available to you once you set up your Google account.
Setting up an account is easy. Point your web browser to the main Google web page.
The main Google page is the starting point for searches and other applications and features.
You can sign up for an account, manage your Gmail or start a Google group from here.
Find "Sign In" at the top right-hand corner.
This is a link and will lead you to where you can sign into an account or create one.
Fill out the required form.
Google ask you for a current email address, password, word verification and location.
They also have the terms of service. You must read and agree to these before going on.
Verify your email address.
Once you have submitted the completed form, Google will generate an email to your email address.
It will have a web address that you must visit to verify that you received the email.
Log in to your new Google Account.
Use the email address and password that you selected during sign-up.
You now have access to all the Google features.
Explore your new Google account features, including email, groups and the personalized homepages.
TIP : If ever you need to get google homepage back from other search providers try to take over your search engine
Create the menu tab on your homepage right click in the top toolbar you should see a number of toolbar options select the menu tab which will add File Edit View Favorites Tools and Help
Click on the tools at the bottom of the drop down list will be internet options or
Click start control panel internet options you will see a home page box To Create Page Tabs type
each adress on its own line (type in google.com) or your preferred home page and browser
below that will be change search defaults click on settings you will see all search Providers
Toolbar extensions and Accelerators you have
have if dont need any of them you can disable or remove them
Sign In to Gmail
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.
Mobile Phone
Press the "Menu" key on your mobile phone and click the "Browser" icon.
Click the Web address bar and enter "gmail.com."
Enter your Gmail username and password and click "Sign In."

http://mail.google.com/mail/

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.