thats a diferent story , btw 3 people reported lag , i know why - older pc
solution :
1)if 32 bit is 2 much use 16 bit and change resolution to 800x600/640x480
2) quit any 3d programm or unselect any programm in your boot up commands
3)boot up your virtual memory to : Min:900 max 900
4)Clean your ram with Ram-optimaizer or any other ram programm
Try thees