Hi there,
I'm replying to this page because I've found the solution to the problem.
Click this link and download the file (not my page)
http://fixsonycursor.doprado.com.br/
Download the drivers, extract the file, double click setup.
This works and my cursor no longer goes crazy at the top left side of the screen!!
THANKS GOD!!!!
Sony Support, please post this link on an official forum or