Hi again Lester,
So eventually the problem returned. I did opt to do a complete windows re-install and oncer again updated the drivers. Unlike before when the mouse would work initially then stop clinking after a while- now the task bar is frozen immediately once the boot process is complete I need to Task Manager and once this done i am able to click once again. I have tried deleting the mouse / keyboard drivers but the problem persists. They are Microsoft sculpt keyboard and mouse and have also downloaded and installed the software for these but again it does not seem to have any impact. On the plus side of things at least my computer is uasble at the moment as once as once I reset it using the task manager the problem does not re-occur but I am obviously worried that the problem is not yet resolved and can deteriorate again at a moments notice! Best j.