This is really strange, but today and after installing some software, my mouse started double clicking every time I used the left button. Being a wireless mouse, I just thought that I was dealing with some radio interference or whatever... Tried all the common fixes but nothing worked (uninstalling and installing drivers and devices, changing settings, using other USB port for the adapter)! Then I did what everyone does and I found this weird solution on the comments here, and the problem is apparently solved!
"Press the right click button and
hold-it, turn the mouse off and on, leave the right mouse button pressed
while clicking on the left click button 5 times Quit pressing the
right click button and turn the mouse off. Click and hold the right
mouse button, turn the mouse on and finally release the right mouse
button."