I have a IBM laptop ThinkPad R40 laptop, the on-board left-mouse button does not work. I have done this action:
Control Panel -> Mouse -> UltraNav -> Enable TouchPad -> Settings -> Button -> Left Button Action -> Jump tp the Start Button -> OK
Then the left button is working. But when boot computer, on the login screen, the left button still does not work. After user logon, it is working.
How do I set to make the left-button work on the login screen?