I activated windows 7 with Uloader 220.127.116.11 by the slic 2 method and restart the pc.
After boot post, black screen with blinking cursor on the upper left corner.
Eventually, I remove the hardisk and format the hardisk with another computer.
Lastly, fixed back to the culprit pc and re-install windows 7.
Finally it worked.
May I know what caused the hardisk not detecting after Uloader activation.