I have a Toshiba Tecra A11, running Windows 7 Pro 64-bit, and use a Microsoft Wireless Notebook Presenter Mouse 8000 with Bluetooth. Occasionally if I leave the computer on and it goes to sleep, when I return to it, my mouse won't respond and the Bluetooth icon on my tray is red and says 'Bluetooth is not ready.' So far, the only way I've found to get it to resume working is to restart the computer. Is there a way to prevent this from happening, or to fix it besides having to reboot?