Uninstall any old mouse drivers via Device Manager. Unplug the Battletron mouse, wait 10 seconds, then plug it into a USB 2.0 port (not USB 3.0, as some chipsets conflict).
: If you need to remap side buttons for gaming and there is no official software, third-party utilities like X-Mouse Button Control are commonly used by the community for budget mice. Battletron Gaming Mouse Software Download Extra Quality