When you uninstall Microsoft IntelliPoint software, it leaves some registry entries.
There is already enough clutter in the registry and we don't need a poorly written unistall to contribute to it.
Use Regedt32 to navigate to:
HKEY_CURRENT_USER\Control Panel\Microsoft Input Devices\WindowsPointer
Delete the following Value Names:
If no Value Names remain after deleting the above, Delete the WindowsPointer key.