I am still working on the Upgrade to Windows 7 from Windows Vista did uninstall of items in previous post plus a few others that were suggested on the Windows 7 Upgrade Advisor Report. Thank you for your help with my last question. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.Printing Errors or Lights & Stuck Print Jobs.Notebook Hardware and Upgrade Questions.Intellipoint settings should now be loaded at login, overriding the default OS X settings for pointer speed, scrolling, and buttons.Go back to your Finder window, select the file 'MicrosoftMouseHelper', and drag this into the login items area on the right-hand side of the login items page (in the System Preferences window).Click on your user, and click Login Items.Leave the above open, and now open System Preferences.Right click on 'Microsoft Mouse.prefpane'.Navigate to: /Library/PreferencePanes/.Heres my cleaner/less-intrusive solution: When you open the Microsoft Mouse preference pane, the above process starts and stays in memory after you close the system preferences, hence why you only need to open the preferences then close, and why approach works rough-enough. (Use Activity Monitor to check yourself if this is running on clean boot and it likely won't be running, or if you already opened the preference pane as per suggestion, kill MicrosoftMouseHelper process and see the mouse behaviour change). This, I believe, is the issue as it must be run to activate the hardware and software features for the mouse. After trying to learn AppleScript for 2 hours to hack around the issue and adjust my sensitivity settings through an automated script to adjust the preference pane, I remembered there should be a process called 'MicrosoftMouseHelper' loaded for the Intellipoint to work, and I noticed it wasn't running on a clean reboot. The issue for me was tracking speed (and mouse acceleration!) reverting to the OS X default and not using Intellipoint settings. I believe I have discovered the real reason why this happens and the cleanest work around (version 8.2 doesn't fix this for me).

Download microsoft intellipoint 8.2