I forgot password how to login in windows - Lenovo IdeaPad S10 - 42312BU Notebook

the whole purpose of the PW is so others can't read your private data.

So why would guessing it ever be good.?
What screen fails. THE W8 WINDOWS login?
yes/no.?
yes, then do all users on that screen fail to login
is the login local or windows Live login.

live login is easy to reset at ms.com
MS page to do that is outlook.com (using 2nd PC that works)
next time write it down, say in book only you know using postitnote. (memorize only the page #)
end the drama forever.

If you have forgotten Windows login password then you can reset it by using windows password reset disk. If you don't have password reset disk then you can use stellar phoenix password recovery software to reset your password.

If you means you forgot windows xp password, you can use Windows Password Recovery Tool.It is a good tool for anyone who lost windows password. It can recover windows login password in few steps.

Lost Windows password:

• Login as Administrator. Try with no password (load safe mode if you don't see Administrator). Press F8 during boot to access Safe Mode.
  
• Login as other user (if other user is available) and manage users. Must be an administrator.
  
• Reformat computer.
  
• Use 3rd party software to remove password. Like http://www.top-password.com/reset-windows-password.html
  

I have forgot windows password a few days ago

And my friend David who is an IT engineer helped me reset the Vista password with a tool called Windows Password Reset Deluxe, just need a few minutes I can log on my computer normally without password.

You can have a try.

Forgot Windows XP password? The first thing which you check is whether you forgot windows xp login password or not. When we install Windows, it automatically creates an account "Administrator" and sets its password to blank. So if you have forgot your user account password then try this:
Start system and when you See Windows Welcome screen / Login screen, press ctrl+alt+del keys Twice and it'll show Classic Login box. Now type "Administrator" (without quotes) in Username and leave Password field blank. Now press Enter and you should be able to log in Windows.
Now you can reset your account password from "Control Panel -> User Accounts".
Same thing can be done using Safe Mode. In Safe Mode Windows will show this in-built Administrator account in Login screen.
Windows XP and further versions also provide another method to recover forgotten Password by using "Reset Disk". If you created a Password Reset Disk in past, you can use that disk to reset the password. Or try free program called Ophcrack or Windows Password Recovery Tool 3.0.

More detail guide on: http://www.windowspasswordsrecovery.com/bypass-xp-password-in-safe-mode.htm

I know an administrator tool for Windows password reset, Windows Password Breaker, which can easily reset forgotten Windows password to blank without reinstall. you can have a try.

Or 6 ways for Windows 7 password reset could also be helpful.

You will have to get microsoft or whoever you ought the computer from to do it for you. unless you have administrative privledges, you cant log on.

Have your HP laptop login password forgotten? Do you have another administrator? Have you created Windows password reset disk on your HP computer when it is available? Or whether you have installation CD?

If you have administrator, just change HP login account to this administrator and access HP computer with it. At this time, no matter which account, you can easily change or remove its password on Control Panel.

If you have password reset disk, on Windows login screen after you type incorrect password, there will be a message "Reset Password" prompting you to reset forgotten Windows password with reset disk. Just follow password reset wizard to do.

If you have installation CD, it will help you to restore HP computer or repair computer. But it is still dangerous for us to use it because it will delete some important data on your computer.
In consideration of data safe on computer, Windows Password Genius provides a safe Windows password reset environment WinPE. With it and in such password recovery environment, you will don't need to worry about data lost or damaged.

This is a video showing how to use it.
http://www.youtube.com/watch?v=quxuEqpG6f4&feature=youtu.be

If you forgot the windows login password and want to recover or reset windows password, there is two methods to reset windows login password:

Methods 1: Use the password reset disk to recover the Windows password, by this methods, you need create a Windows password reset disk before you have lost or forgotten your Windows admin password.

Method 2: Using Windows Password Recovery software to recover Windows password
As an easy method to recover the forgotten Windows password, there are only four steps as follow:
Step1: Download Anmosoft Windows Password Reset V8.0( http://www.resetwindowspassword.com
)and install it.
Step2: Burn the ISO image file onto a blank CD/DVD or USB.
Step3: Boot up your Windows PC by the bootable burned CD/DVD or USB in minutes.
Step4: Remove the forgotten Windows password on the operation interface and logon PC without password.