Lenovo s10-3c Asking restore Password - Lenovo IdeaPad S103 Netbook

The laptop cannot decide by itself to ask for a password. It was set by the owner. Ask around you to see if anybody admits doing it.
Or take the computer to a Lenovo service center to have the password removed. Be ready to show proof of ownership. Be ready to pay foe the service if the laptop is no longer under warranty.
Out of curiosity: have tried contacting Lenovo support?

You need to ask Lenovo support why it does this, as it is not normal.

Are you sure it is not asking for the password number?

This you need to get from the router as it depends on the protocol used. If it is your router you should already have the password.

there are a couple of free password recovery tools that do the job .. but it atkes long and is quite technical
there is a software review on this blog to unlock windows computer
http://www.digitalgrog.com.au/software/reset-your-windows-7-password-in-under-5-minutes/
but it is paid software ..i have used it ..it works

Have you just bought this used ? Is the laptop asking for password or is Windows asking for password ?

Virus invade your computer?
You can reset windows password if you do not want to reinstall windows with lose data.
Reset windows password, you can use safe mode, rese disk and so on.And I recommend use reset tool,such as Windows Password Reset , for it is convenience and guaranteed

all the information that can be provided on BIOS passwords in can be found in the Hardware Maintenance Manual also.
http://support.lenovo.com/en_US/guides-and-manuals/detail.page?DocID=UM013338
If you can't remember the password please ask the previous owner, if there is one,

To reset the BIOS password read the information from this link.

In case of your Lenovo laptop the easiest method would be using software from Hiren's Boot CD as it's pretty hard to open it up and reach for the CMOS battery or the jumper.

Create a different user account. You won't have administrator permissions but you still may be able to perform the task you were trying to do when it prompted you for a password.

My lephone A10 mobile phone lock code is lost. so Help to me.

Try tapping F8 when booting up. This should take you to a black screen with white text with Safe Mode at the top. Using the arrow keys select Safe Mode and press Enter. It you can boot up windows from here, then go to the start button, control panel, user accounts, and delete the password.