Hi I had the same problem using window 7 pc.
i solved problem by going to control panel-mouse settings-on mouse properties there is a section to change to change settings to enable program-specific settings i set this to Blender and i changed my middle button function to ALT when using this program.
It works as follows:-1.Wheel only=Zoom in and Out 2.Ctrl+Wheel=Left to right 3.Ctrl+Alt+Wheel=360 spin 4.Alt+Shift=Pan.
hope this helps
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