Hi Zolebaba,
Thank you for posting your query in Microsoft Community Forums.
I see that you are unable to create pin password or picture password on Windows 8 computer.
I understand it must be frustrating, but rest assured, we are here to help you and guide you in the right direction.
Help me with more information.
1. Are you using the latest version of the video driver as supplied by the computer's manufacturer? (If not, then I would recommend going to their website and downloading it.)
2. Is the computer connected to any network?(Domain for example)
3. Were you able to setup pin password earlier?
Refer to the help articles and check if it helps.
Why can't I create a picture password?
What shapes can I use for my picture password?
Windows 8 How To: 8. Set up a Picture Password
Reply with more information to help you better.
Keep us posted if you face any issues on windows in future. We will be glad to help you.