Apple Magic Mouse: How to Make Vertical Scrolling and Swiping to Work in Windows
When using an Apple Magic Mouse with Microsoft Windows XP or Vista, vertical scrolling and two-finger swiping may not work.
Boot Camp, Windows Vista, Windows XP, Apple Magic Mouse
If you are using Mac OS X v10.6 Snow Leopard, download and install the Boot Camp 3.1 Update to enable these functions in Windows.
For computers with Mac OS X v 10.5 Leopard, download and install the Boot Camp 2.2 Update.
Swiping is not a supported feature in Windows.