.keyboard key struck

[rakand]

probably one key of my acer laptop is struck, the cursor gets to left start point at the top of desktop. what to do, tried cleaning and all.

 

[hang-the-9]

Did you reseat the keyboard connections? Do you mean that the cursor drifts on it's own? It's likely a bad keyboard or touchpad/trackpad. A bad single key or a set of bad keys would not cause the mouse to drift.