Because it is a Microsoft mouse, and you are running a Microsoft platform operating system, you will not need the disk, it automatically installs., You can access additional features in Control Panel under Mouse. I adjusted my Scroll Wheel to slow down a bit and made sure the left side forward and back buttons were working during internet browsing. I love this thing! I know you will too.
I will never order anything but a five button cordless mouse again!
Cheers,
Sean