Hello. I thought I had solved this problem but no. I am writing from Italy. A friend of mine has a problem. She has an Asus laptop with Windows 7 but has trouble with the cursor: it jumps around. What can be the solution? The problem persists even with an external mouse. I thought the keyboard was faulty and replaced same with a new one but no success. I would like to solve this problem because the lady is a very good friend of mine, I have known her for 38 years. She does not use the laptop a lot and does not want to change it for another one, but when she writes an email or a letter, trying various browsers, the wording disappears on its own. Maybe it is a software problem, maybe it can be solved by re-installing Windows (which I can do), but before I attempt that, I would like to know your opinion. Thanks a lot and best regards