To disable gratuitous ARP (on windows) you can do the following steps:
	1. Start the registry editor (regedit.exe)
	2. Locate - "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters"
	3. Double-click the ArpRetryCount value, type 0, and then click OK. If it does not exist create of type REG_DWORD
	4. Close the registry and reboot.
	5. Done!