There is a registry setting named FlipFlopWheel that does exactly this and can be found after typing regedit in Run and pressing enter which will launch Registry Editor.
Dec 14, 2014 - Change the scroll direction on the boot camp windows machine. Such a way that I could not work with the reverse scroll anymore on windows.
Then search for keyword FlipFlopWheel.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetEnumHIDVID_???VID_???Device Parameters.
![Bootcamp Invert Scroll Direction Bootcamp Invert Scroll Direction](http://tsentas.net/wp-content/uploads/2015/11/scrolling.png)
The search will find multiple mouse entries. The default value for FlipFlopWheel will be 0 and needs to change to 1.
After the change reboot in order to take effect.
To get the VID_??? number you need to:
![Bootcamp invert scroll direction video Bootcamp invert scroll direction video](/uploads/1/2/6/2/126292861/978335208.png)
Go to the Control Panel and then go to Mouse, click the Hardware tab, then click Properties.
In HID-compliant mouse Properties window click the Details tab and select the Device Instance Path property.
The registry path is in there!
Then to make scrolling smoother go to the Control Panel and then go to Mouse, click the Wheel tab, then change 'the following number of lines at a time' to 1.