Para mim, o Eithermouse funciona melhor no Windows 8.
Ele muda automaticamente as configurações ao usar o touchpad ou o mouse. Dessa forma, as configurações de velocidade são ajustadas automaticamente.
http://www.eithermouse.com/
Do site deles
Multiple mice, individual settings!
Instantly changes settings when any mouse is used:
swap buttons
mirror cursor
adjust speeds
and more...
Leave multiple mice on a pc and automatically swap buttons on each mouse
Have a left-handed and a right-handed mouse always connected and ready to use
Great for multi-user/public workstations to accomodate both left and right handed users.
Possibly helps with RSI/injury issues by allowing switching between left and right hand.
Easily swap mouse buttons from system tray if only one mouse is used
Tray icon points to active mouse
Freeware! no ads, no nags, free software, suggestions appreciated!