Just don’t install mouse drivers/software it gave me headaches too. windows will handell the mouse just fine. Especialy logitech drivers are crap. it installs software wich I don’t want, just wanted only a driver not software but it just installs a load of crap, and it makes logfiles in the root of the c drive wich also made piss me off, why no logfile in c:\program files\logitech wich a good coded program should do!