Is there a fix for my new Windows 7 Enterprise 64 bit not recognizing my Wireless Intellimouse Explo

[AWS]

Just upgraded my system from Windows XP to Windows 7 Enterprise 64 bit. Now, my system does not recognise my Wireless Intellimouse Explorer as being a Microsoft product. Looks like the system has loaded some default mouse driver with limited functionality.
My software that came with the mouse is not compatible with Windows 7. There is no Windows 7 driver available for the Wireless Intellimouse Explorer. The mouse is connected via USB.

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