How to unlock the Windows ultimate password that I forgot?

When I open my screen there is my password lost .I have forgot so how to get the password of windows ultimate .I have tried that f8 and safe mode but there is no any safe mode to do my operation . But there is debug mode and any other so can tell me how to unlock my screen.

You can get into safe mode when your computer cannot start normally or come across other computer errors. But administrator password will be required if you have ever password protected your user accounts in Windows. In most cases, you cannot unlock Windows password by getting into safe mode, unless you can log into your computer without another admin account.

Actually the best solution to fixing a lost password in Windows is to create a boot password reset disk. There are many great third-party applications that allow you do make such a disk.  Windows Password Unlocker and Windows Password Breaker are two great examples.

With Windows Password Unlocker, you can instantly make a Windows PE boot disk to bypass forgotten local and domain password in Windows 8/7/Vista/XP and Windows servers. The Window PE boot disk comes in GUI interface and easy to operate for anyone. Just a few clicks required.

With Windows Password Breaker, you can burn a boot DOS disk in seconds to reset forgotten password for Windows 8/7/Vista/XP and Windows servers. Compared with the Windows PE version, the DOS command prompt version is better at compatibility.

No matter what tool you choose, you can reset Windows password in two minutes. 3 Steps :
Step 1. Download and install Windows Password Unlocker or  Breaker in any PC.
Step 2. Burn a boot password reset disk with CD/DVD or USB drive in seconds.
Step 3. Boot the locked PC from the boot disk and reset Windows password in Windows PE or DOS command prompt.