If during a game the meter starts acting up, check to see if some application, or applications, have started running in the background on your computer.
As far as the keys on your keyboard not responding that is most likely an equipment issue at your end.
If the CPU in your computer is busy running other stuff don't expect the meter to play smoothly.
Many players use Task Manager in Performance mode to monitor their computer's CPU performance while they play WGT. To the point that players only start the down swing of the club when CPU performance is at it's lowest ebb.
There are several things you can do at your end to help make the meter play smoothly on your computer every time you play WGT.