Powers on but screen does not come up, works until today, comes up that I have choice of safe mode, safe mode with networking, safe mode with command prompt, last know good configuration and start windows normally, have tried all and they all lead me back to same screen

You can try the following:

If your S.O. is Windows you can try any Windows Password Recovery Tool

Alternatively you can ty( if Windows):

Step 1: Boot or Reboot your Windows laptop (it is a Windows 7 example ).
Step 2: Hold on F8 to enter Advanced Boot Options before the Windows 7 loading screen appears.
Or Press CTRL to enter Advanced Boot Options when computer power on.
Step 3: Choose Safe Mode with Command Prompt in the coming screen, and press Enter.
There are three options for choice, Safe Mode, Safe Mode with Networking and Safe Mode with Command Prompt. In order to reset Windows user password with command prompt, select Safe Mode with Command Prompt.
Step 4: Wait for Windows 7 to load files until Windows login screen comes out.
Step 5: Log in with an administrator account or built-in administrator when you see login screen.
Step 6: Command Prompt runs automatically. Type net user in the Command Prompt and press Enter to see how many user accounts in locked laptop. Then all of laptop users will be listed in the Command Prompt.
Step 7: Choose one administrator to reset forgotten password for laptop.
Type net user fuzi 123 and hit Enter. Suppose 'fuzi' is your locked Windows user name. Then '123' would be new password you reset for it.
Step 8: Login your laptop with the new password after successfully laptop password reset.

When you start your computer. Hit the F8 key, and then a prompt will come up to boot in Safe Mode, Safe Mode with Networking, and Safe Mode in Command Prompt. Make your choice.

Step 1:
Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
If done properly the user should get to a screen similar to the below screen. Select the option for Safe mode command prompt only Windows Advanced Options Menu
Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice. To perform a system restore, follow these steps: 1.Click Start, click Run, type msconfig, and then click OK. 2.On the General tab, click Launch System Restore. 3.Select Restore my computer to an earlier time, and then click Next. 4.Calendar dates in bold are possible restore points. Click the most recent one to view system restore information. 5.Select a system checkpoint or an installation restore point, and then click Next. 6.Close all other programs. 7.To start the system restore, click Next. 8.Your computer restarts. Repeat steps 1 through 8 until you fix your configuration issue.

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
If done properly the user should get to a screen similar to the below screen. Select the option for Safe mode command prompt only Windows Advanced Options Menu
Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice. To perform a system restore, follow these steps: 1.Click Start, click Run, type msconfig, and then click OK. 2.On the General tab, click Launch System Restore. 3.Select Restore my computer to an earlier time, and then click Next. 4.Calendar dates in bold are possible restore points. Click the most recent one to view system restore information. 5.Select a system checkpoint or an installation restore point, and then click Next. 6.Close all other programs. 7.To start the system restore, click Next. 8.Your computer restarts. Repeat steps 1 through 8 until you fix your configuration issue. Hope this helps.

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
Reboot the computer As the computer is booting repeatadly press the F8 key as the computer is booting If done properly the user should get to a screen similar to the below screen. Select the option for Safe mode command prompt only Windows Advanced Options Menu
Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice select the safe mode option then run your antivirus if still cant get rid of the virus restart again Use the up and down arrow keys to move the highlight to your choice. select safe mode with networking download anti malware and microsoft security essentials http://www.microsoft.com/en-us/download/virus-malware.aspx?q=virus anti virus and malware http://windows.microsoft.com/en-US/windows/products/security-essentials

Hope this helps.

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
Reboot the computer As the computer is booting repeatadly press the F8 key as the computer is booting If done properly the user should get to a screen similar to the below screen. Select the option for Safe mode command prompt only Windows Advanced Options Menu
Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice select the safe mode option then run your antivirus if still cant get rid of the virus restart again Use the up and down arrow keys to move the highlight to your choice. select safe mode with networking download anti malware and microsoft security essentials http://www.microsoft.com/en-us/download/virus-malware.aspx?q=virus anti virus and malware http://windows.microsoft.com/en-US/windows/products/security-essentials

Reboot and keep pressing F8 until you see the boot manager come up (with the selections Safe Mode, Safe Mode with Networking, etc.). Hope this helps.

There is a problem with the OS.

Try re-installing it.

If it still doeasnt solve the problem, then there is a problem with your hard drive.

Thank You

Please rate my solution

Reboot into Safe Mode by repeatingly tapping on F8 while in process of rebooting and then select "last known good configuration". If that fails reboot again to safe mode and select safe mode with command prompt and in the command prompt type "chkdsk /f /r " <enter>

If that doesnt work do place your Windows CD into the Cd-Rom, reboot and select option "Repair"

Try to boot it to last known configuration.

Hope it will work.