Hi, I set mouserate tweak to 500 Hz but nothing change in my nlite instalation, with Windows 2003 Server 32 and 64 bits versions tested. I see that nothing change when I run USBMOUSERATE 1.1 I have a MX 1000 Logitech mouse, if I use with the standard mouserate frequency cursor jump on screen sometimes when I move the mouse. With USBMouserate could change to 500 Hz and everything works fine in Windows 2003 Server 32 bits, but in 64 bit version XP and Server 2003 USBmouserate doenst work. In nlite 1.01 this tweak works. ps.: sorry about my bad english