Single click acting like double click

[Sue]

I have Windows set to launch items with a single click, and never had any
problems, but suddenly, if I click on the title bar for a window, it will
resize, and if I click on a word it is selected, rather than just placing the
cursor there. This just started. How do I fix this?
Thanks,
Sue

 

[Elmo]

I have Windows set to launch items with a single click, and never had any
problems, but suddenly, if I click on the title bar for a window, it will
resize, and if I click on a word it is selected, rather than just placing the
cursor there. This just started. How do I fix this?
Thanks,
Sue

Is the mouse old? I suspect the button is bouncing. Try a different
mouse as a test, or just reverse the buttons so the right-click is the
select button. If that prevents the problem, the mouse is bad.

 

[Ron Badour]

Try setting back to a double click, reboot and then change back to a single
click. If that doesn't do it, try a system restore at a date prior to the
onset of the problem