Hi Sataporn ☂,
I understand how it feels when you try to login to the laptop by entering the password and the keyboard doesn’t work properly as expected. I will be happy to help you with this issue.
- Do you have Windows 8 DVD?
If you have Windows 8 DVD, I would suggest you to perform System Restore from Windows 8 DVD and check if the issue persists.
Follow the steps:
a) Once you get the welcome screen of installation with the option “Install now”
b) Click on Repair your computer
c) On the next page click on Advanced Options
d) Now click on Troubleshoot
e) Lastly click on System Restore and follow the on screen instructions
This may take 15 to 20 minutes to restore. Once completed try to login to your desktop.
Note: If you have purchased Windows 8 online from Windows store but did not select the option to include a Windows 8 backup DVD, you may use the Windows Order Summary page to purchase backup media and have it shipped to them.
http://www.mswos.com/
I hope it helps. If you have any issues in future please let us know. We will be happy to help you.