if you have problem with your logitech-drivers (most users have), try this:
download the new mouseware 9.73 from http://www.logitech.com
do not install them. instead using winrar extract the contents of the exe you get into a folder.
go to control panel->system->device manager->mice and other pointing devices and click on update drivers. now instead of letting windows search for the best drivers manually go to the folder that you extracted and install lmusbxp.inf or lmps2xp.inf (for windows xp and usb or if you use ps2 then use the lmps2xp.inf). do the same thing for windows 2000 except use the lmouusb2.inf or lmouse.inf depending on whether you have usb or ps2 respectively.
go into regedit and edit under hkey_local_machinesystemcurrentcontrolsetserviceslmouflt2parametersopticalmouse11 000
mousespeedx to 100
mousespeedy to 100
acceleration to off
resolution to 8restart your computer.
poof, you should be good to go you should have now 0 positive and negetive acceleration and your mx300/500/700 should be working at 800dpi.
alguien me podria explikar el 2º y 3º punto???
muchas gracias. yo y el ingles chungo.
salu2