Hi,
so my drivers & BIOS is up to date, I have ASUS P7P55D PRO, 4GB RAM, Intel i5, ASUS EAH5770 CuCore 1GB with Win7Ultimate, I just disable power-on USB in BIOS, but nothing changes... My previous mouses (1. Logitech, 2. Genius - both classic optical) works fine.
next I try mouse with my sisters 2months old Lenovo notebook, with same effect.
for now I tried this mouse at my comp in work (older Core2Duo E4500, WinXP Pro) with same effect - win found new device, loads driver and mous not work, no led lights up, just laser sensor...
when I will be home, I would try disable BIOS power saving