E-machine/ how can i get into the computer? forgot password

resources here

https://www.google.com/search?q=rocketmail+forgot+password

How to reset Yahoo email password if forgotten?
Use Sign-in Helper, Yahoo's password reset and account recovery tool, to get back in to your account.
...
Reset a forgotten password

1. Go to the Sign-in Helper.
2. Enter one of the account recovery items listed.
3. Click Continue.
4. Follow the instructions given in the Sign-in Helper.

Reset or change your Yahoo password

https://in.help.yahoo.com > SLN27051
Search for: How to reset Yahoo email password if forgotten?

https://www.lifewire.com/how-to-recover-a-forgotten-gmail-password-1172087


What Do You Do If You Forget Your Gmail Password

fixya is unable to assist with forgotten passwords passcoded pins puks and to reset passwords need old one you can try provider for assistance

https://www.microsoft.com/surface/en-us/support/security-sign-in-and-accounts/forgot-my-surface-password?os=windows-10

Bad news. You can't, unless you super nerd. Don't suppose thought to safe to computer to remember, if so can possible access doc.

Forgot your Microsoft account password?
If you've forgotten your Microsoft account password or if you want to reset it, see Recover your Microsoft account password.

Also, refer to below link for more details on account details for Microsoft Xbox 360....
http://support.xbox.com/en-US/billing-and-subscriptions/account-management/forgot-microsoft-account

What the Os douse?

You can choose the methods for your systems to reset password.

Break Windows 7password
Crack Windows XpPassword
Hack WindowsVista Administrator Password

If you forgot the password on your operating system try to reformat your PC operating system. because you cannot really access your computer without the password.

Click I can't access my account on yahoo mail page.
Select forgot password. If you forgot your password.
Click on Next.
Enter your ID and code shown below.
Then verify your ID and reset your password.
Note make sure you provide the correct details.

As far as I know there a are a lot of ways to solve your problem and the easiest one of them is to use program designed to see to such problem!
And I have tried many of them, according to my experience, I recommend you the password recovery bundle which not only can recovery your windows password but also other files' password.
And I google the address for you. it is http://www.recoverlostpassword.com/products/passwordrecovery.html
Wish you good luck.