The question is when the mouse left button can work, then there is no reaction
of right click. If the right click is OK, then the left click has no reaction.
(I change the left and right button at Control Panel-->Mouse property page.

I check in th Registry, and find

HKEY_CURRENT_USER\Control Panel\Mouse
MouseThreshold1 "2"
MouseThreshold2 "0"
SwapMouseButtons "1"

Can I modify the item values upper to restore the mouse?
Thanks!