I use Macs for most things but have one Windows PC. To match the Mac mouse scrolling directions on a Windows machine:

1. Run Powershell as an administrator.
2. Get-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Enum\HID\*\*\Device` Parameters FlipFlopWheel -EA 0 | ForEach-Object { Set-ItemProperty $_.PSPath FlipFlopWheel 1 }

Thanks to Richard