My game is sluggish, jerky, or freezes up.
The cause of the problem is usually another application that is consuming a high percentage of system resources, particularly CPU. To keep from adversely affecting other programs on your computer, the game was designed to yield priority to any applications or processes that are running on the computer, even if they are background processes such as Windows system tasks or anti-virus protection processes.
The best way to determine if another application is causing the problem is to open Task Manager (right-click on the taskbar or Ctrl-Alt-Del and select Task Manager), click on the Processes tab, and sort the processes by CPU usage (click on the CPU heading twice - the first time will show the lowest usage processes on top; the second click will sort by processes that are using the highest amount of CPU).
We know of several applications and Windows system processes that occasionally use very high percentage of CPU, including a popular virus scanning program. If you find a process that is consistently using more than 50% CPU, it is likely causing the game to become sluggish, jerky, or even freeze for a time. In that situation, you should try stopping the process that is consuming excessive system resources and see if the game operates normally again. If you don't find an application that is consuming system resources, you should check to make sure that you have the proper driver installed for your processor. At least one user has reported severe problems with game performance after allowing Windows to install a processor driver during a Windows update. After removing the driver and installing the correct processor driver from the device manufacturer, the problem was corrected.