00 00 00 00 00 00 00 00
　　00 a0 00 00 00 00 00 00
　　00 40 01 00 00 00 00 00
　　00 80 02 00 00 00 00 00
　　00 00 05 00 00 00 00 00

Change the value of SmoothMouseYCurve to the one as below:
        00 00 00 00 00 00 00 00
　　66 a6 02 00 00 00 00 00
　　cd 4c 05 00 00 00 00 00
　　a0 99 0a 00 00 00 00 00
　　38 33 15 00 00 00 00 00
After finishing the modification, confirm there’s no mistake, then restart the computer.

Solution 2: adjust USB interface setting
The sampling rate of USB mouse is kind of high, reaching about 125Hz. However, the common optical mouse we see, generally, is above 1000. So the default setting is definitely impossible. Then we’d have to change manually. According to BENQ lambkin mouse for an example, first optional is to check up whether your mouse has installed correct driver. If correct driver is installed, please open the mouse option in control panel, in the pointer option, there’s the column to choose pointer moving speed, generally drag it to the proper position you thought OK. To increase the precision of pointer could help let mouse move more smoothly.

Solution 3: the optimization of PS/2
 PS/2 mouse in WinXP will have a more advanced optimization solution. In device manager, open mouse property, click Advanced button. Then you can find few o