Hi Bill,
First thing that comes to my mind is that you may be using a BlueTooth mouse.
These are plagues with lag problems for games in which an instant response is required.
Swap it out for one with a cord, and see if there is a difference.
I play with a standard infra-red cordless and it is ok.
Secondly, be sure you are using a Web Browser which is favoured by most in WGT.
Comodo Dragon or Maxthon
finally, some PC maintenance may be in order.
1. clear the browser cache and flash cache regularly.
2. minimise the programs you have running every time you pc boots into windows. Most of these will have icons sitting by your clock down in the System tray.
For help with any of these WGT has a Forum Search panel over there'ish ->>
Happy Hitting!