Enable pairing mode by holding the pairing button (often on the bottom) until the LED flashes.
Never download mouse drivers from third-party "driver update" websites. They often bundle malware.
To completely remove Trust driver software:
Don't just plug and play. Install the software. Tweak the LOD. Update the firmware. A $20 mouse with tuned drivers can outperform a $100 mouse running on default Windows settings.
: If it's a .zip file, extract it first. Run the .exe as an administrator and follow the on-screen wizard.
Most Trust mice fall into two categories: