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download the latest driver (december 29.2017) here

choose Artist13.3, Star 06, 05, G540 & G430 driver for Win driver
disable antivirus before downloading

now after installing, open it (the icon) at the taskbar... change "absolute mode" to "relative mode"
then open osu
go to option ---> input
tick Raw Input and Map Absolute Raw
then calibrate your mouse sensitivity
mine is 3.0x

dont forget to disable mouse buttons while playing, press F10

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